O'SULLIVAN, Brian

Parent entities and officers

Inapplicable

Individuals in focus

Related profiles found in government register

O'sullivan, Brian
Irish born in October 1969
Resident in Ireland
Registered addresses and corresponding companies
- Isleclash House, Isleclash, Fermoy, Co. Cork, Ireland
  IIF 1 IIF 2 IIF 3 (more)
  IIF 4 IIF 5 IIF 6 IIF 7 IIF 8 IIF 9 IIF 10 IIF 11 IIF 12 IIF 13
O'sullivan, Brian
Irish director born in October 1969
Resident in Ireland
Registered addresses and corresponding companies
- Britway, Castlelyons, Fermoy, Co. Cork, Ireland
  IIF 14
- Britway, Castlelyons, Fermoy, Co. Cork, Ireland, Ireland
  IIF 15 IIF 16
- Isleclash House, Isleclash, Fermoy, Co. Cork, Ireland
  IIF 17
O' Sullivan, Brian
Irish born in October 1969
Resident in Ireland
Registered addresses and corresponding companies
- Isleclash House, Isleclash, Fermoy, Cork, P61 F512, Ireland
  IIF 18
O'sullivan, Brian
Irish company director born in August 1963
Resident in Ireland
Registered addresses and corresponding companies
- Heather House, Torca Road, Dalkey, Dublin, Ireland
  IIF 19 IIF 20
O'sullivan, Brian
Irish director born in August 1963
Resident in Ireland
Registered addresses and corresponding companies
- 11b Torca Road, Dalkey, Co Dublin, Ireland
  IIF 21
- 11b Torca Road, Dublin, Dalkey, IRISH, Ireland
  IIF 22
O'sullivan, Brian
Irish ceo born in April 1967
Resident in Ireland
Registered addresses and corresponding companies
- Unit B1 Hume Centre, Park West Industrial Estate, Dublin 12, D12 P3V9, Ireland
  IIF 23
O’sullivan, Brian
Irish born in October 1969
Resident in Ireland
Registered addresses and corresponding companies
- Isleclash House, Isleclash, Fermoy, Co. Cork, Ireland
  IIF 24 IIF 25 IIF 26 (more)
  IIF 27 IIF 28
- Spiersbridge Business Park, Spiersbridge Avenue, Glasgow, G46 8NL, Scotland
  IIF 29 IIF 30 IIF 31
- Houndhill Park, Bolton Road, Wath-upon-dearne, Rotherham, S63 7LG, England
  IIF 32
O’sullivan, Brian
Irish director born in October 1969
Resident in Ireland
Registered addresses and corresponding companies
- 50, Millennium Way, Lurgan, County Armagh, BT66 8DH, United Kingdom
  IIF 33
O Sullivan, Brian
Irish company director born in October 1969
Registered addresses and corresponding companies
- 12 Watergold Building, Douglas, Co Cork, Ireland
  IIF 34
O'sullivan, Brian Marcus
Irish consultant born in April 1969
Resident in Ireland
Registered addresses and corresponding companies
- 840 Ibis Court, Centre Park, Warrington, Cheshire, WA1 1RL, England
  IIF 35
O'sullivan, Brian Michael
Irish born in August 1963
Resident in Ireland
Registered addresses and corresponding companies
- 13 Castle Mews, Old Farm Road, Hampton, TW12 3RJ, England
  IIF 36
- Venson House, 1 A C Court, High Street, Thames Ditton, Surrey, KT7 0SR
  IIF 37
O'sullivan, Brian Michael
Irish company director born in August 1963
Resident in Ireland
Registered addresses and corresponding companies
- Heather House, 11b Torca Road, Dalkey, Dublin, Ireland
  IIF 38
- The Hub, Fowler Avenue, Iq Farnborough, Farnborough, Hampshire, GU14 7JP, United Kingdom
  IIF 39
- 32 Farney Park, Sandymount, Dublin, 4, Ireland
  IIF 40
- Venson House, 1 A C Court, High Street, Thames Ditton, Surrey, KT7 0SR
  IIF 41 IIF 42
O'sullivan, Brian Michael
Irish director born in August 1963
Resident in Ireland
Registered addresses and corresponding companies
- Ifsc House, Custom House Quay, Dublin, Dub1, Ireland
  IIF 43
- 32 Farney Park, Sandymount, Dublin, 4, Ireland
  IIF 44 IIF 45
- Venson House, 1 A C Court, High Street, Thames Ditton, Surrey, KT7 0SR, United Kingdom
  IIF 46
O'sullivan, Brian Michael
Irish financial analyst born in August 1963
Resident in Ireland
Registered addresses and corresponding companies
- Heather House, Torca Road, Dalkey, County Dublin, Ireland
  IIF 47
O'sullivan, Brian Michael
Irish financial consultant born in August 1963
Resident in Ireland
Registered addresses and corresponding companies
- Heather House, Torca Road, Dalkey, Dublin, Co Dublin, Ireland
  IIF 48
O'sullivan, Brian Michael
Irish investment manager born in August 1963
Resident in Ireland
Registered addresses and corresponding companies
- 32 Farney Park, Sandymount, Dublin, 4, Ireland
  IIF 49
O'sullivan, Brian Michael
Irish financial analyst
Registered addresses and corresponding companies
- 32 Farney Park, Sandymount, Dublin, 4, Ireland
  IIF 50
Mr Brian O' Sullivan
Irish born in October 1969
Resident in Ireland
Registered addresses and corresponding companies
- Isleclash House, Isleclash, Fermoy, Cork, P61 F512, Ireland
  IIF 51
Mr Brian O'sullivan
Irish born in October 1969
Resident in Ireland
Registered addresses and corresponding companies
- 110 Anglesey Business Park, Littleworth Lane, Hednesford, Staffordshire, WS12 1NR
  IIF 52
Mr. Brian O'sullivan
Irish born in October 1969
Resident in Ireland
Registered addresses and corresponding companies
- Unit 4, Lancaster Way, Stratton Business Park, Biggleswadestratton Business Park, Bedfordshire, SG18 8YL, England
  IIF 53
Mr Brian O'sullivan
Irish born in April 1969
Resident in Ireland
Registered addresses and corresponding companies
- 840 Ibis Court, Centre Park, Warrington, Cheshire, WA1 1RL, England
  IIF 54
O'sullivan, Brian
Registered addresses and corresponding companies
- Britway, Castlelyons, Fermoy, Co. Cork, Ireland
  IIF 55
Mr Brian O'sullivan
Irish born in August 1963
Resident in Ireland
Registered addresses and corresponding companies
- 11, Longbow Close, Pennine Business Park, Bradley, Huddersfield, West Yorkshire, HD2 1GQ
  IIF 56

Offspring entities and appointments

Active 35

1
ALL PURPOSE PACKAGING LIMITED
- now Appointment / Control
Other registered number: 04145121
LEANMODE LIMITED - 2008-09-04 Appointment / Control
Aspect One, Gunnels Wood Road, Stevenage, Hertfordshire
Dissolved Corporate (1 parent)
Officer
2007-01-31 ~ dissolved
IIF 15 - Director → ME
2
BOX - MART LIMITED
Appointment / Control
Lynn Lane, Shenstone, Staffs
Active Corporate (2 parents)
Equity (Company account)
2,560,106 GBP2021-12-31
Officer
2022-06-01 ~ now
IIF 27 - Director → ME
3
BQUK LIMITED
- now Appointment / Control
BETDAQ (UK) LIMITED - 2014-09-25 Appointment / Control
Suite 1 St. James's Square, London, United Kingdom
Dissolved Corporate (2 parents)
Total Assets Less Current Liabilities (Company account)
100 GBP2016-01-31
Officer
2014-09-08 ~ dissolved
IIF 19 - Director → ME
4
BROOMCO (4064) LIMITED
Appointment / Control
Venson House 1 A C Court, High Street, Thames Ditton, Surrey, United Kingdom
Dissolved Corporate (3 parents)
Equity (Company account)
2 GBP2017-12-31
Officer
2006-12-05 ~ dissolved
IIF 46 - Director → ME
5
EMPIRE TAPES LTD
- now Appointment / Control
EMPIRE TAPES PLC - 2025-04-02
Houndhill Park Bolton Road, Wath-upon-dearne, Rotherham, England
Active Corporate (2 parents)
Equity (Company account)
1,958,737 GBP2024-07-31
Officer
2025-05-28 ~ now
IIF 32 - Director → ME
6
EXCHANGE TRADING STRATEGIES LIMITED
Appointment / Control
Suite 1, Third Floor, 11-12 St. James's Square, London, England
Dissolved Corporate (2 parents)
Total Assets Less Current Liabilities (Company account)
2 GBP2017-06-30
Officer
2014-09-11 ~ dissolved
IIF 38 - Director → ME
7
FILLMORE PACKAGING LIMITED
- now Appointment / Control
T.FILLMORE(NORWICH)LIMITED - 1993-02-03
Aspect One, Gunnels Wood Road, Stevenage, Hertfordshire
Dissolved Corporate (1 parent)
Officer
2007-01-31 ~ dissolved
IIF 16 - Director → ME
8
GXUK LIMITED
- now Appointment / Control
GLOBAL BETTING EXCHANGE UK LIMITED - 2014-09-25 Appointment / Control
LAW 2349 LIMITED - 2001-11-02
Suite 1, 3rd Floor 11-12 St. James’s Square, London, United Kingdom
Dissolved Corporate (3 parents)
Officer
2014-09-08 ~ dissolved
IIF 20 - Director → ME
9
I2I EUROPE LIMITED
Appointment / Control
110 Anglesey Business Park, Littleworth Lane, Hednesford, Staffordshire
Active Corporate (2 parents)
Profit/Loss (Company account)
46,567 GBP2023-01-01 ~ 2023-12-31
Officer
2024-04-08 ~ now
IIF 2 - Director → ME
Person with significant control
2024-04-08 ~ now
IIF 52 - Ownership of shares – 75% or more → OE
10
JAMES HAMILTON & COMPANY (LURGAN) LIMITED
Appointment / Control
50 Millennium Way, Lurgan, County Armagh, Northern Ireland
Active Corporate (2 parents)
Officer
2023-06-13 ~ now
IIF 28 - Director → ME
11
JAMES P SIM & CO. LIMITED
- now Appointment / Control
PARKTWEED LIMITED - 1994-10-27
Spiersbridge Business Park, Spiersbridge Avenue, Glasgow
Active Corporate (2 parents, 1 offspring)
Equity (Company account)
Retained earnings (accumulated losses)
6,897,164 GBP2022-08-31
Officer
2025-09-12 ~ now
IIF 31 - Director → ME
12
KONECT GLOBAL SOLUTIONS LTD
Appointment / Control
Unit 4 Lancaster Way, Stratton Business Park, Biggleswade, Bedfordshire, England
Active Corporate (1 parent)
Equity (Company account)
100 GBP2024-06-30
Officer
2023-06-21 ~ now
IIF 18 - Director → ME
Person with significant control
2023-06-21 ~ now
IIF 51 - Has significant influence or control → OE
13
MENFORD PACKAGING
- now Appointment / Control
MENFORD CO. LIMITED - 2000-01-01
MENFORD PACKAGING LIMITED - 1992-11-23
Central Park, Mallusk, Newtownabbey, County Antrim
Dissolved Corporate (1 parent)
Officer
2006-05-31 ~ dissolved
IIF 14 - Director → ME
2006-05-31 ~ dissolved
IIF 55 - Secretary → ME
14
ROWPAK CONTAINERS LIMITED
- now Appointment / Control
TWP (NEWCO) 103 LIMITED - 2011-06-28
Related registrations: 05999133, 06389837, 06452831 ... (more)
110 Anglesey Business Park Littleworth Road, Hednesford, Cannock, Staffordshire
Dissolved Corporate (2 parents)
Equity (Company account)
1 GBP2023-03-31
Officer
2024-04-08 ~ dissolved
IIF 17 - Director → ME
15
SAM MCLERNON HOLDINGS LIMITED
- now Appointment / Control
MOYNE SHELF COMPANY (NO.187) LIMITED - 2006-09-26
Related registrations: NI020012, NI022876, NI022877 ... (more)
3 Ballyknockan Road, Saintfield, Ballynahinch
Active Corporate (3 parents, 1 offspring)
Equity (Company account)
8,458 GBP2021-12-31
Officer
2022-07-08 ~ now
IIF 13 - Director → ME
16
SAM MCLERNON LIMITED
Appointment / Control
3 Ballyknockan Road, Saintfield, Ballynahinch, Co Down
Active Corporate (3 parents)
Equity (Company account)
108,181 GBP2021-12-31
Officer
2022-07-08 ~ now
IIF 6 - Director → ME
17
SARCON (NO. 233) LIMITED
Appointment / Control
Other registered numbers: NI072526, NI073763
Central Park, Mallusk Road, Newtownabbey
Dissolved Corporate (1 parent)
Officer
2007-02-12 ~ dissolved
IIF 34 - Director → ME
18
SIMPAC (HOLDINGS) LIMITED
Appointment / Control
Spiersbridge Business Park, Spiersbridge Avenue, Glasgow
Active Corporate (2 parents, 1 offspring)
Equity (Company account)
1,483,587 GBP2024-08-31
Officer
2025-09-12 ~ now
IIF 29 - Director → ME
19
SIMPAC LIMITED
Appointment / Control
Spiersbridge Business Park, Spiersbridge Avenue, Thornliebank, Glasgow, Lanarkshire
Active Corporate (2 parents)
Officer
2025-09-12 ~ now
IIF 30 - Director → ME
20
SMITH & BATESON LIMITED,
Appointment / Control
Stronghold House, Kitling Road, Knowsley Business Park, Merseyside
Active Corporate (2 parents)
Officer
2019-10-01 ~ now
IIF 9 - Director → ME
21
SMITH BATESON HOLDINGS LIMITED
Appointment / Control
Stronghold House Kitling Road, Knowsley Business Park, Prescot, Merseyside
Active Corporate (2 parents, 1 offspring)
Officer
2019-10-01 ~ now
IIF 5 - Director → ME
22
SULLEE LTD
Appointment / Control
840 Ibis Court Centre Park, Warrington, Cheshire, England
Dissolved Corporate (1 parent)
Equity (Company account)
-198.23 GBP2024-05-31
Officer
2014-10-27 ~ dissolved
IIF 35 - Director → ME
Person with significant control
2016-04-06 ~ dissolved
IIF 54 - Ownership of shares – 75% or more → OE
23
SWANLINE GROUP LIMITED
- now Appointment / Control
SWANLINE PRINT LIMITED - 2024-01-05 Appointment / Control
LEAVALE RECYCLING LIMITED - 2001-05-09
Whitebridge Park, Whitebridge Way, Stone, Staffordshire
Active Corporate (2 parents)
Officer
2022-06-01 ~ now
IIF 25 - Director → ME
24
SWANLINE HOLDINGS LTD
Appointment / Control
C/o Swanline Print Ltd Whitebridge Park, Whitebridge Way, Stone, Staffordshire, United Kingdom
Active Corporate (2 parents, 1 offspring)
Officer
2022-06-01 ~ now
IIF 26 - Director → ME
25
SWANLINE PAPER & BOARD LIMITED
Appointment / Control
Alma Park Woodway Lane, Claybrooke Parva, Lutterworth, Leicestershire
Liquidation Corporate (2 parents)
Equity (Company account)
164,535 GBP2021-12-31
Officer
2022-06-01 ~ now
IIF 24 - Director → ME
26
TRUST HOUSES (OVERSEAS) LIMITED
Appointment / Control
C/o David Thomson, London City Airport Ltd, London City Airport, Royal Docks, London
Dissolved Corporate (3 parents)
Officer
1996-12-20 ~ dissolved
IIF 47 - Director → ME
27
VAIOPAK LIMITED
- now Appointment / Control
ADDCUP MEDIA LIMITED - 2009-09-17
ADDCUP LIMITED - 2007-10-30
Alma Park, Woodway Lane, Claybrooke Parva, Lutterworth, Leicestershire
Liquidation Corporate (2 parents)
Equity (Company account)
1,280,841 GBP2019-04-30
Officer
2019-04-30 ~ now
IIF 12 - Director → ME
28
VENSON GROUP PLC
- now Appointment / Control
CROSSCATCH ENTERPRISES LIMITED - 1992-06-23
C/o Grant Thornton Uk Llp, Grant Thornton House, Melton House, London
Dissolved Corporate (4 parents)
Officer
2002-04-22 ~ dissolved
IIF 49 - Director → ME
29
WEEDON CORRUGATED PRODUCTS LIMITED
- now Appointment / Control
TWP (NEWCO) 96 LIMITED - 2011-04-28
Related registrations: 06820205, 06820312
110 Anglesey Business Park, Littleworth Road Hednesford, Cannock, Staffordshire
Active Corporate (2 parents)
Equity (Company account)
-101,037 GBP2023-12-31
Officer
2024-04-08 ~ now
IIF 3 - Director → ME
30
WEEDON HOLDINGS LIMITED
- now Appointment / Control
FASTSAMPLE LIMITED - 1987-11-19
110 Anglesey Business Park, Littleworth Road Hednesford, Cannock, Staffordshire
Active Corporate (2 parents, 4 offsprings)
Equity (Company account)
65,598 GBP2023-12-31
Officer
2024-04-08 ~ now
IIF 4 - Director → ME
31
WEEDON PACKAGING SOLUTION CENTRE LIMITED
- now Appointment / Control
HINTON CASE COMPANY LIMITED(THE) - 2006-02-28
110 Anglesey Business Park, Littleworth Road Hednesford, Cannock, Staffordshire
Active Corporate (2 parents)
Equity (Company account)
2,080,683 GBP2023-12-31
Officer
2024-04-08 ~ now
IIF 1 - Director → ME
32
ZEUS PACKAGING (NI) LIMITED
- now Appointment / Control
COOGAN & WATTS LIMITED - 2007-06-25 Appointment / Control
Coogan & Watts Ltd, Central Park, Mallusk, Newtownabbey
Active Corporate (2 parents)
Officer
2007-02-12 ~ now
IIF 10 - Director → ME
33
ZEUS PACKAGING (UK) LIMITED
- now Appointment / Control
ALL PURPOSE PACKAGING LIMITED - 2008-09-04 Appointment / Control
Related registration: 02732188
SOLIDCOVE LIMITED - 2001-02-20
Unit 4 Lancaster Way, Stratton Business Park, Biggleswade, Bedfordshire, England
Active Corporate (2 parents)
Officer
2008-05-14 ~ now
IIF 11 - Director → ME
34
ZEUS PACKAGING AGRI LIMITED
Appointment / Control
Unit 4 Lancaster Way, Stratton Business Park, Biggleswadestratton Business Park, Bedfordshire, England
Active Corporate (3 parents)
Officer
2014-01-28 ~ now
IIF 7 - Director → ME
35
ZEUS PACKAGING INVESTMENTS (UK) LIMITED
Appointment / Control
Unit 4 Lancaster Way, Stratton Business Park, Biggleswadestratton Business Park, Bedfordshire, England
Active Corporate (1 parent, 13 offsprings)
Officer
2007-01-16 ~ now
IIF 8 - Director → ME
Person with significant control
2016-06-30 ~ now
IIF 53 - Ownership of shares – 75% or more → OE

Ceased 14

1
5 STAR BOOKMAKERS LIMITED
Appointment / Control
Harbour Court Compass Road, North Harbour, Portsmouth, Hampshire
Dissolved Corporate (2 parents)
Total Assets Less Current Liabilities (Company account)
510 GBP2017-06-30
Officer
2002-12-03 ~ 2002-12-23
IIF 45 - Director → ME
2
FULFIL NUTRITION GB LIMITED
Appointment / Control
889 Greenford Road, Greenford, England
Active Corporate (5 parents)
Officer
2019-09-21 ~ 2020-06-16
IIF 23 - Director → ME
3
GU MEDICAL LIMITED
- now
THE GENITO-URINARY MANUFACTURING COMPANY LIMITED - 2001-10-08 Appointment / Control
CAVERCROFT LIMITED - 1989-05-30
42-46 Booth Drive, Park Farm South, Wellingborough, Northhamptonshire
Dissolved Corporate (4 parents)
Officer
1995-11-28 ~ 1996-04-29
IIF 40 - Director → ME
4
GXUK LIMITED
- now
GLOBAL BETTING EXCHANGE UK LIMITED - 2014-09-25 Appointment / Control
LAW 2349 LIMITED - 2001-11-02
Suite 1, 3rd Floor 11-12 St. James’s Square, London, United Kingdom
Dissolved Corporate (3 parents)
Officer
2005-03-21 ~ 2011-12-05
IIF 21 - Director → ME
5
I-NEDA LTD
Appointment / Control
The Hub Fowler Avenue, Iq Farnborough, Farnborough, Hampshire
Active Corporate (8 parents, 3 offsprings)
Equity (Company account)
1,597,519 GBP2024-12-31
Officer
2011-04-01 ~ 2023-06-23
IIF 43 - Director → ME
2009-02-18 ~ 2010-05-20
IIF 39 - Director → ME
6
INTERNATIONAL INVESTMENT & UNDERWRITING LIMITED
Appointment / Control
16 High Holburn 16 High Holborn, London, England
Active Corporate (3 parents)
Equity (Company account)
1 GBP2024-08-31
Officer
2004-08-10 ~ 2023-06-23
IIF 48 - Director → ME
7
JAMES HAMILTON BEARINGS LIMITED
Appointment / Control
50 Millennium Way, Lurgan, County Armagh, United Kingdom
Active Corporate (2 parents)
Officer
2024-09-17 ~ 2025-02-24
IIF 33 - Director → ME
8
JOHN BROWNE BOOKMAKERS LIMITED
- now Appointment / Control
DEALREMOVE LIMITED - 1999-02-01
Harbour Court Compass Road, North Harbour, Portsmouth, Hampshire
Dissolved Corporate (2 parents)
Total Assets Less Current Liabilities (Company account)
24 GBP2017-06-30
Officer
2002-12-03 ~ 2002-12-23
IIF 44 - Director → ME
9
RACECOURSE DATA TECHNOLOGIES LIMITED
- now Appointment / Control
WB CO (1329) LIMITED - 2004-07-28
11 Longbow Close, Pennine Business Park, Bradley, Huddersfield, West Yorkshire
Active Corporate (3 parents, 1 offspring)
Equity (Company account)
-1,085,855 GBP2024-12-31
Officer
2007-02-16 ~ 2023-06-23
IIF 22 - Director → ME
Person with significant control
2016-04-06 ~ 2023-06-23
IIF 56 - Right to appoint or remove directors → OE
10
TRUST HOUSES (OVERSEAS) LIMITED
Appointment / Control
C/o David Thomson, London City Airport Ltd, London City Airport, Royal Docks, London
Dissolved Corporate (3 parents)
Officer
1996-12-20 ~ 1998-02-24
IIF 50 - Secretary → ME
11
VENSON AUTOMOTIVE SOLUTIONS LIMITED
- now Appointment / Control
VENSON PROFESSIONAL CONTRACTS LIMITED - 2000-03-10
UDFM LIMITED. - 1994-11-02
VENSON SERVICES LIMITED - 1993-09-01
BOOKRACE LIMITED - 1992-06-23
13 Castle Mews Castle Mews, Hampton, England
Active Corporate (5 parents)
Officer
2006-12-08 ~ 2023-06-23
IIF 41 - Director → ME
12
VENSON HERTS LIMITED
Appointment / Control
13 Castle Mews Castle Mews, Hampton, England
Active Corporate (5 parents)
Officer
2006-12-08 ~ 2023-06-23
IIF 36 - Director → ME
13
VENSON NOTTINGHAM LIMITED
- now Appointment / Control
MIVEN (VEHICLES) LIMITED - 2001-07-17
13 Castle Mews Castle Mews, Hampton, England
Active Corporate (5 parents)
Officer
2006-12-08 ~ 2023-06-23
IIF 37 - Director → ME
14
VENSON PROPERTIES LIMITED
- now Appointment / Control
MUNDAYS (693) LIMITED - 2001-04-18
Related registration: 03818181
13 Castle Mews Castle Mews, Hampton, England
Active Corporate (5 parents)
Officer
2006-12-08 ~ 2023-06-23
IIF 42 - Director → ME

O'sullivan, Brian

O'sullivan, Brian

O'sullivan, Brian

O' Sullivan, Brian

O'sullivan, Brian

O'sullivan, Brian

O'sullivan, Brian

O’sullivan, Brian

O’sullivan, Brian

O Sullivan, Brian

O'sullivan, Brian Marcus

O'sullivan, Brian Michael

O'sullivan, Brian Michael

O'sullivan, Brian Michael

O'sullivan, Brian Michael

O'sullivan, Brian Michael

O'sullivan, Brian Michael

O'sullivan, Brian Michael

Mr Brian O' Sullivan

Mr Brian O'sullivan

Mr. Brian O'sullivan

Mr Brian O'sullivan

O'sullivan, Brian

Mr Brian O'sullivan