Historic monitoring evidence · Environment Agency
Alderford Mill
East Anglia · 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.
Separate-signal passport
What this record proves — and what it does not.
No blended quality score. Identity, monitoring, freshness, access and rules stay as separate signals so one strong fact cannot hide a missing one.
Stable monitoring site
- AnglerRadar ID
- ea-fish-site:792
- EA waterbody ID
- GB105037041260
- Waterbody
- River Colne Upper
- Catchment
- Colne Catchment
Dated survey record
- Scope
- freshwater
- Survey events
- 8
- Positive taxa shown
- 11
- Recorded methods
- AC ELECTRIC FISHING · PDC ELECTRIC FISHING
Latest survey about 18 years ago
Coverage runs from 9 May 1984 to 13 Jun 2008. This is historic monitoring, never a live presence or catch forecast.
Access remains unresolved
The survey carries no fishing-rights boundary, permission, opening status or safety notice. Check the owner, rod licence, current byelaws and conditions separately.
Location protection: AnglerRadar does not print the survey coordinate on this page, and nearby API results use coarsened survey areas rather than exact species-linked points.
Observed taxa
What monitoring recorded here
Taxa are ordered by latest survey date. Counts and records reflect monitoring events, not an angling forecast.
Pike
Esox lucius- First record
- 9 May 1984
- Latest record
- 13 Jun 2008
- Survey events
- 8
Roach
Rutilus rutilus- First record
- 11 Sept 1987
- Latest record
- 13 Jun 2008
- Survey events
- 7
European eels > elvers
Anguilla anguilla- First record
- 9 May 1984
- Latest record
- 29 Jun 2005
- Survey events
- 7
Perch
Perca fluviatilis- First record
- 9 May 1984
- Latest record
- 29 Jun 2005
- Survey events
- 6
Dace
Leuciscus leuciscus- First record
- 21 May 1996
- Latest record
- 29 Jun 2005
- Survey events
- 2
Rudd
Scardinius erythrophthalmus- First record
- 15 Jun 1999
- Latest record
- 16 Jul 2002
- Survey events
- 2
Mirror carp
Cyprinus carpio- First record
- 16 Jul 2002
- Latest record
- 16 Jul 2002
- Survey events
- 1
Roach x common bream hybrid
Rutilus rutilus x Abramis brama- First record
- 13 Sept 1993
- Latest record
- 21 May 1996
- Survey events
- 2
Common bream
Abramis brama- First record
- 11 Sept 1987
- Latest record
- 13 Sept 1993
- Survey events
- 2
Roach x rudd hybrid
Rutilus rutilus x Scardinius erythrophthalmus- First record
- 13 Sept 1993
- Latest record
- 13 Sept 1993
- Survey events
- 1
Rudd x common bream hybrid
Scardinius erythrophthalmus x Abramis brama- First record
- 13 Sept 1993
- Latest record
- 13 Sept 1993
- 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
More evidence nearby
Other surveyed waters in East Anglia.
1,913 survey sites in this ecology region carry recorded taxa. Each keeps its own dates and source.
Browse East Anglia survey sites →