Historic monitoring evidence · Environment Agency
Cornmill Meadows 3 (Mile Nursery)
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.
Roach
Rutilus rutilus- First record
- 17 Dec 2004
- Latest record
- 8 May 2025
- Survey events
- 14
Perch
Perca fluviatilis- First record
- 17 Dec 2004
- Latest record
- 8 May 2025
- Survey events
- 14
Tench
Tinca tinca- First record
- 17 Dec 2004
- Latest record
- 8 May 2025
- Survey events
- 9
European eel
Anguilla anguilla- First record
- 1 May 2007
- Latest record
- 8 May 2025
- Survey events
- 8
Ruffe
Gymnocephalus cernuus- First record
- 9 May 2008
- Latest record
- 8 May 2025
- Survey events
- 6
Pike varieties
Esox lucius- First record
- 9 May 2008
- Latest record
- 8 May 2025
- Survey events
- 4
Chub
Leuciscus cephalus- First record
- 17 Dec 2004
- Latest record
- 6 Aug 2024
- Survey events
- 13
Bleak
Alburnus alburnus- First record
- 1 May 2007
- Latest record
- 6 Aug 2024
- Survey events
- 11
Bullhead
Cottus gobio- First record
- 1 May 2007
- Latest record
- 6 Aug 2024
- Survey events
- 11
Minnow
Phoxinus phoxinus- First record
- 1 May 2007
- Latest record
- 6 Aug 2024
- Survey events
- 10
Pike
Esox lucius- First record
- 17 Dec 2004
- Latest record
- 6 Aug 2024
- Survey events
- 9
Stone loach
Barbatula barbatula- First record
- 1 May 2007
- Latest record
- 6 Aug 2024
- Survey events
- 9
Common bream
Abramis brama- First record
- 1 May 2007
- Latest record
- 6 Aug 2024
- Survey events
- 8
European eels > elvers
Anguilla anguilla- First record
- 17 Dec 2004
- Latest record
- 6 Aug 2024
- Survey events
- 6
Rudd
Scardinius erythrophthalmus- First record
- 6 Aug 2024
- Latest record
- 6 Aug 2024
- Survey events
- 1
Dace
Leuciscus leuciscus- First record
- 1 May 2007
- Latest record
- 8 Jun 2023
- Survey events
- 10
Gudgeon
Gobio gobio- First record
- 1 May 2007
- Latest record
- 8 Jun 2023
- Survey events
- 10
Brown / sea trout
Salmo trutta- First record
- 10 May 2017
- Latest record
- 10 May 2017
- Survey events
- 1
Silver bream
Abramis bjoerkna- First record
- 10 May 2017
- Latest record
- 10 May 2017
- Survey events
- 1
European elvers
Anguilla anguilla- First record
- 10 May 2017
- Latest record
- 10 May 2017
- Survey events
- 1
Barbel
Barbus barbus- First record
- 16 May 2016
- Latest record
- 16 May 2016
- Survey events
- 1
Brook lamprey
Lampetra planeri- First record
- 16 May 2016
- Latest record
- 16 May 2016
- Survey events
- 1
Roach x common bream hybrid
Rutilus rutilus x Abramis brama- First record
- 16 May 2016
- Latest record
- 16 May 2016
- Survey events
- 1
Tench varieties
Tinca tinca- First record
- 1 May 2007
- Latest record
- 5 May 2010
- Survey events
- 3
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