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

Ash (Hertfordshire and North London)

Survey sites
13
Survey events
50
Recorded taxa
20
Evidence period
3 Mar 2003 – 18 Sept 2025
Sites latest within 2 years
2
Sites latest over 10 years ago
8
EA waterbody IDs
GB106038033290
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

17 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. Brown / sea troutAsh (Hertfordshire and North London) 13River Kennet 47Latest evidence 18 Sept 2025 · 14 Oct 2025
  2. PikeAsh (Hertfordshire and North London) 3River Kennet 47Latest evidence 12 Sept 2019 · 9 Oct 2025
  3. ChubAsh (Hertfordshire and North London) 3River Kennet 41Latest evidence 28 Sept 2023 · 9 Oct 2025
  4. DaceAsh (Hertfordshire and North London) 2River Kennet 41Latest evidence 28 Sept 2023 · 9 Oct 2025
  5. PerchAsh (Hertfordshire and North London) 4River Kennet 38Latest evidence 19 Sept 2023 · 9 Oct 2025
  6. RoachAsh (Hertfordshire and North London) 5River Kennet 36Latest evidence 19 Sept 2023 · 8 Oct 2025
  7. GudgeonAsh (Hertfordshire and North London) 2River Kennet 31Latest evidence 19 Sept 2023 · 1 Oct 2025
  8. GraylingAsh (Hertfordshire and North London) 4River Kennet 21Latest evidence 18 Sept 2025 · 9 Oct 2025
  9. BullheadAsh (Hertfordshire and North London) 12River Kennet 11Latest evidence 18 Sept 2025 · 14 Oct 2025
  10. MinnowAsh (Hertfordshire and North London) 11River Kennet 11Latest evidence 18 Sept 2025 · 14 Oct 2025
  11. Stone loachAsh (Hertfordshire and North London) 6River Kennet 8Latest evidence 18 Sept 2025 · 8 Oct 2025
  12. TenchAsh (Hertfordshire and North London) 1River Kennet 13Latest evidence 29 Oct 2021 · 13 Nov 2024
  13. 3-spined sticklebackAsh (Hertfordshire and North London) 9River Kennet 4Latest evidence 18 Sept 2025 · 14 Oct 2025
  14. Brook lampreyAsh (Hertfordshire and North London) 6River Kennet 7Latest evidence 18 Sept 2025 · 14 Oct 2025
  15. Rainbow troutAsh (Hertfordshire and North London) 1River Kennet 8Latest evidence 22 Jun 2006 · 8 Oct 2024
  16. Pike varietiesAsh (Hertfordshire and North London) 3River Kennet 5Latest evidence 15 Sept 2011 · 1 Oct 2025
  17. Brook lamprey > ammocoeteAsh (Hertfordshire and North London) 4River Kennet 1Latest evidence 29 Oct 2021 · 6 Oct 2023

Only in the Ash (Hertfordshire and North London) survey set

  1. Lamprey sp.5 sites · latest 15 Sept 2010
  2. Brook lamprey ammocoetes2 sites · latest 22 Oct 2021
  3. 10-spined stickleback1 site · latest 16 Oct 2007

Only in the River Kennet survey set

  1. Bleak27 sites · latest 25 Sept 2025
  2. Barbel22 sites · latest 25 Sept 2025
  3. Common bream19 sites · latest 25 Sept 2025
  4. Atlantic salmon14 sites · latest 25 Oct 2010
  5. Roach x common bream hybrid12 sites · latest 25 Oct 2018
  6. European eel9 sites · latest 8 Nov 2013
  7. Ruffe9 sites · latest 5 Nov 2022
  8. Common [wild] carp5 sites · latest 24 Oct 2018
  9. European eels > elvers5 sites · latest 10 Oct 2025
  10. Mirror carp4 sites · latest 4 Nov 2008
  11. Common carp varieties3 sites · latest 22 Oct 2015
  12. Rudd3 sites · latest 4 Nov 2022
  13. Silver bream3 sites · latest 4 Nov 2022
  14. 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
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