Historic monitoring evidence · Environment Agency
Thorney Golf Course
Hertfordshire and North London · survey site
This page records ecological survey evidence. It is not proof of current fish presence, abundance, fishing quality, access, permission or safety at this location.
Observed taxa
What monitoring recorded here
Taxa are ordered by latest survey date. Counts and records reflect monitoring events, not an angling forecast.
Perch
Perca fluviatilis- First record
- 13 May 1986
- Latest record
- 20 Jun 2023
- Survey events
- 15
Chub
Leuciscus cephalus- First record
- 13 May 1986
- Latest record
- 20 Jun 2023
- Survey events
- 12
Gudgeon
Gobio gobio- First record
- 13 May 1986
- Latest record
- 20 Jun 2023
- Survey events
- 10
Bullhead
Cottus gobio- First record
- 16 Oct 2001
- Latest record
- 20 Jun 2023
- Survey events
- 10
Roach
Rutilus rutilus- First record
- 13 May 1986
- Latest record
- 20 Jun 2023
- Survey events
- 9
Pike
Esox lucius- First record
- 16 Oct 2001
- Latest record
- 20 Jun 2023
- Survey events
- 9
Minnow
Phoxinus phoxinus- First record
- 16 Oct 2001
- Latest record
- 20 Jun 2023
- Survey events
- 8
Dace
Leuciscus leuciscus- First record
- 13 May 1986
- Latest record
- 20 Jun 2023
- Survey events
- 4
Barbel
Barbus barbus- First record
- 16 Jul 2004
- Latest record
- 6 Jun 2012
- Survey events
- 5
European eels > elvers
Anguilla anguilla- First record
- 16 Jul 2003
- Latest record
- 6 Jun 2012
- Survey events
- 4
European eel
Anguilla anguilla- First record
- 13 May 1986
- Latest record
- 8 Jun 2010
- Survey events
- 7
Pike varieties
Esox lucius- First record
- 18 Jun 2008
- Latest record
- 8 Jun 2010
- Survey events
- 3
Tench varieties
Tinca tinca- First record
- 8 Jun 2010
- Latest record
- 8 Jun 2010
- Survey events
- 1
Tench
Tinca tinca- First record
- 16 Oct 2001
- Latest record
- 16 Oct 2001
- Survey events
- 1
Rules and access
Check before you travel.
Environment Agency ecology records do not carry fishing-rights boundaries or live restrictions. Confirm the fishery owner, permission, local byelaws, seasonal rules, safety notices and current conditions before setting out.
Check live freshwater fishing rulesProvenance
Source, licence and boundary
- SourceEnvironment Agency Ecology & Fish Data
- LicenceOpen Government Licence v3.0
- Source copy retrieved23 Jul 2026
- Terms checked23 Jul 2026
- CoverageHistoric monitoring evidence, separately dated per record
- Not assertedCurrent presence, access, permission, fishing quality or safety