Historic monitoring evidence · Environment Agency
Hanwell Bridge
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.
Gudgeon
Gobio gobio- First record
- 17 Mar 1999
- Latest record
- 15 Oct 2024
- Survey events
- 6
Roach
Rutilus rutilus- First record
- 17 Mar 1999
- Latest record
- 15 Oct 2024
- Survey events
- 6
Perch
Perca fluviatilis- First record
- 17 Mar 1999
- Latest record
- 15 Oct 2024
- Survey events
- 6
3-spined stickleback
Gasterosteus aculeatus- First record
- 20 Oct 2005
- Latest record
- 15 Oct 2024
- Survey events
- 4
European eels > elvers
Anguilla anguilla- First record
- 24 Oct 2016
- Latest record
- 15 Oct 2024
- Survey events
- 3
Common bream
Abramis brama- First record
- 17 Oct 2023
- Latest record
- 15 Oct 2024
- Survey events
- 2
Chub
Leuciscus cephalus- First record
- 17 Oct 2023
- Latest record
- 17 Oct 2023
- Survey events
- 1
Common [wild] carp
Cyprinus carpio- First record
- 17 Mar 1999
- Latest record
- 24 Oct 2016
- Survey events
- 3
Tench
Tinca tinca- First record
- 24 Oct 2016
- Latest record
- 24 Oct 2016
- Survey events
- 1
Dace
Leuciscus leuciscus- First record
- 17 Mar 1999
- Latest record
- 29 Sept 2010
- Survey events
- 3
European eel
Anguilla anguilla- First record
- 17 Mar 1999
- Latest record
- 29 Sept 2010
- Survey events
- 2
Bleak
Alburnus alburnus- First record
- 29 Sept 2010
- Latest record
- 29 Sept 2010
- Survey events
- 1
Silver bream
Abramis bjoerkna- First record
- 29 Sept 2010
- Latest record
- 29 Sept 2010
- Survey events
- 1
10-spined stickleback
Pungitius pungitius- First record
- 29 Sept 2010
- Latest record
- 29 Sept 2010
- Survey events
- 1
Minnow
Phoxinus phoxinus- First record
- 29 Sept 2010
- Latest record
- 29 Sept 2010
- Survey events
- 1
Roach x common bream hybrid
Rutilus rutilus x Abramis brama- First record
- 17 Mar 1999
- Latest record
- 17 Mar 1999
- 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