ARAnglerRadar evidence & rules

Compare river fishing evidence · England

Same facts.
No winner score.

Choose two named waters and compare the evidence that actually exists. Survey effort, species records and freshness are shown separately because none proves access, current presence or fishing quality.

Hertfordshire and North London

Brent

Survey sites
7
Survey events
20
Recorded taxa
21
Evidence period
13 Oct 1994 – 17 Oct 2024
Sites latest within 2 years
2
Sites latest over 10 years ago
4
EA waterbody IDs
GB106039023590
Access status
Not established by survey data
Thames

River Kennet

Survey sites
56
Survey events
264
Recorded taxa
31
Evidence period
28 Sept 1999 – 14 Oct 2025
Sites latest within 2 years
16
Sites latest over 10 years ago
31
EA waterbody IDs
GB106039017420 · GB106039023120 · GB106039023140 · GB106039023172
Access status
Not established by survey data

Overlap

18 recorded taxa appear in both survey sets

The site counts are shown per water. A higher count can reflect more monitoring sites, not a larger or healthier population.

  1. PikeBrent 1River Kennet 47Latest evidence 17 Oct 2023 · 9 Oct 2025
  2. PerchBrent 7River Kennet 38Latest evidence 17 Oct 2024 · 9 Oct 2025
  3. DaceBrent 4River Kennet 41Latest evidence 25 Oct 2016 · 9 Oct 2025
  4. RoachBrent 7River Kennet 36Latest evidence 17 Oct 2024 · 8 Oct 2025
  5. ChubBrent 2River Kennet 41Latest evidence 17 Oct 2023 · 9 Oct 2025
  6. GudgeonBrent 4River Kennet 31Latest evidence 17 Oct 2024 · 1 Oct 2025
  7. BleakBrent 1River Kennet 27Latest evidence 29 Sept 2010 · 25 Sept 2025
  8. Common breamBrent 4River Kennet 19Latest evidence 15 Oct 2024 · 25 Sept 2025
  9. TenchBrent 2River Kennet 13Latest evidence 17 Oct 2024 · 13 Nov 2024
  10. European eelBrent 4River Kennet 9Latest evidence 22 Jun 2017 · 8 Nov 2013
  11. Roach x common bream hybridBrent 1River Kennet 12Latest evidence 17 Mar 1999 · 25 Oct 2018
  12. MinnowBrent 1River Kennet 11Latest evidence 29 Sept 2010 · 14 Oct 2025
  13. Common [wild] carpBrent 3River Kennet 5Latest evidence 17 Oct 2023 · 24 Oct 2018
  14. European eels > elversBrent 2River Kennet 5Latest evidence 17 Oct 2024 · 10 Oct 2025
  15. 3-spined sticklebackBrent 2River Kennet 4Latest evidence 17 Oct 2024 · 14 Oct 2025
  16. Common carp varietiesBrent 2River Kennet 3Latest evidence 17 Oct 2024 · 22 Oct 2015
  17. RuddBrent 1River Kennet 3Latest evidence 25 Oct 2016 · 4 Nov 2022
  18. Silver breamBrent 1River Kennet 3Latest evidence 29 Sept 2010 · 4 Nov 2022

Only in the Brent survey set

  1. 10-spined stickleback1 site · latest 29 Sept 2010
  2. Roach x silver bream hybrid1 site · latest 16 Mar 1999
  3. Rudd varieties1 site · latest 14 Oct 2005

Only in the River Kennet survey set

  1. Brown / sea trout47 sites · latest 14 Oct 2025
  2. Barbel22 sites · latest 25 Sept 2025
  3. Grayling21 sites · latest 9 Oct 2025
  4. Atlantic salmon14 sites · latest 25 Oct 2010
  5. Bullhead11 sites · latest 14 Oct 2025
  6. Ruffe9 sites · latest 5 Nov 2022
  7. Rainbow trout8 sites · latest 8 Oct 2024
  8. Stone loach8 sites · latest 8 Oct 2025
  9. Brook lamprey7 sites · latest 14 Oct 2025
  10. Pike varieties5 sites · latest 1 Oct 2025
  11. Mirror carp4 sites · latest 4 Nov 2008
  12. Brook lamprey > ammocoete1 site · latest 6 Oct 2023
  13. Golden goldfish1 site · latest 12 Nov 2009

Method and boundary

Comparison, not prediction.

  • SourceEnvironment Agency Ecology & Fish Data
  • LicenceOpen Government Licence v3.0
  • Source copy retrieved23 Jul 2026
  • CoordinatesNot published on this page
  • Not assertedAccess, current presence, abundance, catch prospects or safety