logo
explain how to read the page

The above diagram shows the color scheme of the layout in the main result page. The parent entities and officers are those entities, including individual and legal persons, have significant controls over the company in focus. The offspring entities and appointments are those entities that the company in focus can influence on.

Clicking the links on parent entities or officers, and offspring entities or managed companies will put them in focus and show upstream or downstream connections. In general, ascendant entities can be found by moving toward upstream, and descendant entities are by toward downstream. In this way, progenitor entities such as grandparent companies (parents of parent), sibling companies (children of parent), partner companies (parents of child), and progeny entities such as grandchild companies (children of child) can be found easily.

Parent entities and officers
Active 6
  • 1
    Colliver, Joseph Tregonning
    Born in March 1980
    Individual (4 offsprings)
    Officer
    icon of calendar 2023-11-06 ~ now
    OF - Director → CIF 0
  • 2
    Holden, Simon William
    Individual (1 offspring)
    Officer
    icon of calendar 2021-01-18 ~ now
    OF - Secretary → CIF 0
  • 3
    Bradshaw, John
    Born in April 1964
    Individual (6 offsprings)
    Officer
    icon of calendar 2025-05-01 ~ now
    OF - Director → CIF 0
  • 4
    Parry-billings, Mark, Dr
    Born in May 1964
    Individual (2 offsprings)
    Officer
    icon of calendar 2024-10-10 ~ now
    OF - Director → CIF 0
  • 5
    Murphy, Martin Patrick
    Born in December 1968
    Individual (5 offsprings)
    Officer
    icon of calendar 2025-01-16 ~ now
    OF - Director → CIF 0
  • 6
    POLYGON GLOBAL PARTNERS LLP - 2022-03-08
    POLYGON EQUITIES PARTNERS LLP - 2011-05-27
    icon of address4, Sloane Terrace, London, England
    Active Corporate (4 parents, 2 offsprings)
    Person with significant control
    icon of calendar 2022-03-07 ~ now
    PE - Ownership of voting rights - 75% or moreCIF 0
    PE - Ownership of shares – 75% or moreCIF 0
Ceased 14
  • 1
    Marsden, Richard James
    Chief Executive Officer born in January 1967
    Individual (1 offspring)
    Officer
    icon of calendar 2004-09-16 ~ 2025-07-01
    OF - Director → CIF 0
  • 2
    Ward, John Christopher William
    Finance Director born in January 1961
    Individual
    Officer
    icon of calendar 2004-10-11 ~ 2023-11-03
    OF - Director → CIF 0
    Ward, John Christopher William
    Director
    Individual
    Officer
    icon of calendar 2004-10-11 ~ 2021-01-18
    OF - Secretary → CIF 0
  • 3
    Buchanan, Iain Peter Murray
    Director born in December 1952
    Individual
    Officer
    icon of calendar 2010-06-28 ~ 2022-11-30
    OF - Director → CIF 0
  • 4
    Holgate, Stephen Townley, Professor
    Professor born in May 1947
    Individual (3 offsprings)
    Officer
    icon of calendar 2004-09-16 ~ 2025-01-16
    OF - Director → CIF 0
  • 5
    Gabbay, Felicity Jane, Dr
    Director born in May 1952
    Individual (2 offsprings)
    Officer
    icon of calendar 2022-09-29 ~ 2025-01-16
    OF - Director → CIF 0
  • 6
    Monk, Phillip David, Dr
    Chief Scientific Officer born in April 1969
    Individual (1 offspring)
    Officer
    icon of calendar 2009-09-03 ~ 2024-09-06
    OF - Director → CIF 0
  • 7
    Brooks, John Reginald
    Individual (1 offspring)
    Officer
    icon of calendar 2004-09-16 ~ 2004-10-11
    OF - Secretary → CIF 0
  • 8
    Radford, Amanda Dawn
    Director born in January 1970
    Individual
    Officer
    icon of calendar 2022-11-30 ~ 2025-01-16
    OF - Director → CIF 0
  • 9
    Sundstrom, Susan Margaret
    Business Manager born in May 1957
    Individual (2 offsprings)
    Officer
    icon of calendar 2004-09-16 ~ 2009-09-03
    OF - Director → CIF 0
  • 10
    Shaw, Simon James Blouet
    Chairman born in February 1965
    Individual (8 offsprings)
    Officer
    icon of calendar 2004-09-16 ~ 2024-10-11
    OF - Director → CIF 0
  • 11
    Campbell, David Bruce, Dr
    Director born in October 1944
    Individual (1 offspring)
    Officer
    icon of calendar 2006-04-11 ~ 2025-01-16
    OF - Director → CIF 0
  • 12
    Norwood, David Robert
    Company Director born in October 1968
    Individual (4 offsprings)
    Officer
    icon of calendar 2004-09-16 ~ 2006-04-11
    OF - Director → CIF 0
  • 13
    Clegg, Paul Hugh Anthony
    Director born in May 1960
    Individual (3 offsprings)
    Officer
    icon of calendar 2009-09-03 ~ 2019-06-03
    OF - Director → CIF 0
  • 14
    Harold, Theodora
    Director born in April 1974
    Individual (4 offsprings)
    Officer
    icon of calendar 2021-09-30 ~ 2022-09-29
    OF - Director → CIF 0
parent relation
Company in focus

SYNAIRGEN LIMITED

Previous names
SYNAIRGEN RESEARCH PLC - 2004-10-12
SYNAIRGEN PLC - 2025-05-19
Standard Industrial Classification
72110 - Research And Experimental Development On Biotechnology

Related profiles found in government register
  • SYNAIRGEN LIMITED
    Info
    SYNAIRGEN RESEARCH PLC - 2004-10-12
    SYNAIRGEN PLC - 2004-10-12
    Registered number 05233429
    icon of addressMailpoint 810 Level F, South Block Southampton, General Hospital Tremona Road, Southampton Hampshire SO16 6YD
    PRIVATE LIMITED COMPANY incorporated on 2004-09-16 (21 years 3 months). The company status is Active.
    The last date of confirmation statement was made at 2024-09-16
    CIF 0
  • SYNAIRGEN LIMITED
    S
    Registered number 5233429
    icon of addressMailpoint 810 Southampton General Hospital, Tremona Road, Southampton, United Kingdom, SO16 6YD
    Private Limited Company in Register Of Companies, England
    CIF 1
child relation
Offspring entities and appointments
Active 1
  • SYNAIRGEN LIMITED - 2004-10-12
    icon of addressMailpoint 810 Level F, South Block Southampton, General Hospital Tremona Road, Southampton
    Active Corporate (3 parents)
    Person with significant control
    icon of calendar 2016-04-06 ~ now
    CIF 1 - Ownership of voting rights - 75% or moreOE
    CIF 1 - Right to appoint or remove directorsOE
    CIF 1 - Ownership of shares – 75% or moreOE

The content of this website is protected by AgonGuard.

© 2022-2025 Polylogarithmic Technology Ltd (Registered in England and Wales No. 14256313). All rights reserved.

Contains public sector information retrieved at 12 November 2025 and licensed under the Open Government Licence v3.0.