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Historic monitoring evidence · Environment Agency

Mayes Brook

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.

4survey events
23 Apr 2008first recorded survey
16 Apr 2026latest recorded survey
10observed taxa shown

Observed taxa

What monitoring recorded here

Taxa are ordered by latest survey date. Counts and records reflect monitoring events, not an angling forecast.

European eels > elvers

Anguilla anguilla
First record
11 Apr 2019
Latest record
16 Apr 2026
Survey events
2

10-spined stickleback

Pungitius pungitius
First record
11 Apr 2013
Latest record
11 Apr 2019
Survey events
2

Common [wild] carp

Cyprinus carpio
First record
11 Apr 2019
Latest record
11 Apr 2019
Survey events
1

Mirror carp

Cyprinus carpio
First record
11 Apr 2019
Latest record
11 Apr 2019
Survey events
1

Tench

Tinca tinca
First record
11 Apr 2019
Latest record
11 Apr 2019
Survey events
1

Chub

Leuciscus cephalus
First record
23 Apr 2008
Latest record
11 Apr 2013
Survey events
2

Roach

Rutilus rutilus
First record
23 Apr 2008
Latest record
11 Apr 2013
Survey events
2

European eel

Anguilla anguilla
First record
23 Apr 2008
Latest record
11 Apr 2013
Survey events
2

Dace

Leuciscus leuciscus
First record
23 Apr 2008
Latest record
23 Apr 2008
Survey events
1

Perch

Perca fluviatilis
First record
23 Apr 2008
Latest record
23 Apr 2008
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 rules

Provenance

Source, licence and boundary

Open the official dataset