Historic monitoring evidence · Environment Agency

Forty Hall TMG

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.

2survey events

26 Mar 2009first recorded survey

20 Apr 2010latest recorded survey

1observed taxa shown

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.

01 · Identity

Stable monitoring site

AnglerRadar ID: ea-fish-site:34929
EA waterbody ID: GB106038033180
Waterbody: Turkey Brook
Catchment: Lee

02 · Observed evidence

Dated survey record

Scope: freshwater
Survey events: 2
Positive taxa shown: 1
Recorded methods: ELECTRIC FISHING · PDC ELECTRIC FISHING

03 · Freshness

Latest survey about 16 years ago

Coverage runs from 26 Mar 2009 to 20 Apr 2010. This is historic monitoring, never a live presence or catch forecast.

04 · Trip constraints

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.

Topmouth gudgeon

Pseudorasbora parva

First record: 26 Mar 2009
Latest record: 20 Apr 2010
Survey events: 2

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 rules

Provenance

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

Open the official dataset

More evidence nearby

Other surveyed waters in Hertfordshire and North London.

409 survey sites in this ecology region carry recorded taxa. Each keeps its own dates and source.

Browse Hertfordshire and North London survey sites →