Historic monitoring evidence · Environment Agency
Hanwell
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.
Dace
Leuciscus leuciscus- First record
- 29 Mar 1988
- Latest record
- 29 Mar 1988
- Survey events
- 1
Gudgeon
Gobio gobio- First record
- 29 Mar 1988
- Latest record
- 29 Mar 1988
- Survey events
- 1
Roach
Rutilus rutilus- First record
- 29 Mar 1988
- Latest record
- 29 Mar 1988
- Survey events
- 1
Rudd varieties
Scardinius erythrophthalmus- First record
- 29 Mar 1988
- Latest record
- 29 Mar 1988
- Survey events
- 1
Perch
Perca fluviatilis- First record
- 29 Mar 1988
- Latest record
- 29 Mar 1988
- 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