ARAnglerRadar evidence & rules

Lampetra planeri · England

Where brook lamprey ammocoetes has been recorded

Environment Agency surveys have recorded brook lamprey ammocoetes at 520 sites across 215 waters, between 1990 and 2026. These are monitoring records with dates. They do not establish what is present today, nor that you may fish for it.

Waters

Rivers with the most records

Ordered by how many surveyed sites on each water recorded it. Waters with their own page are linked.

  1. Test30 siteslatest 9 Oct 2025
  2. Itchen (Solent and South Downs)15 siteslatest 5 Sept 2025
  3. Main Inny12 siteslatest 21 Aug 2025
  4. Beaulieu11 siteslatest 29 Jul 2025
  5. Lymington11 siteslatest 17 Sept 2025
  6. Main Allen (Devon and Cornwall and the Isles of Scilly)10 siteslatest 14 Aug 2025
  7. Main Camel9 siteslatest 17 Jul 2025
  8. Main Lyd (Devon and Cornwall and the Isles of Scilly)9 siteslatest 8 Sept 2025
  9. Main Lynher9 siteslatest 1 Jul 2025
  10. Main Tamar9 siteslatest 6 Aug 2025
  11. River Goyt9 siteslatest 10 Sept 2025
  12. Wensum (central)9 siteslatest 10 Sept 2025
  13. Main Ottery8 siteslatest 28 Jul 2025
  14. Glaven (East Anglia)7 siteslatest 16 May 2025
  15. Main Thrushel7 siteslatest 4 Aug 2025
  16. River Dove (West Midlands)7 siteslatest 4 Sept 2023
  17. Testwood & Nursling Fishery7 siteslatest 20 Aug 2025
  18. Tud7 siteslatest 19 May 2025
  19. Wensum (Restoration strategy)7 siteslatest 1 May 2025
  20. Wensum (upper)7 siteslatest 22 Apr 2025
  21. Bure (upper)6 siteslatest 8 Sept 2025
  22. Stiffkey6 siteslatest 1 May 2026
  23. Main Carey5 siteslatest 28 Jul 2025
  24. Main Fal5 siteslatest 16 Aug 2011
  25. Main Fowey5 siteslatest 19 Sept 2024
  26. Main River Parrett5 siteslatest 3 Aug 2011
  27. Main Tiddy Brook5 siteslatest 12 Sept 2024
  28. Main West Looe5 siteslatest 8 Aug 2025
  29. Main Wolf5 siteslatest 16 Sept 2025
  30. River Frome (West Midlands)5 siteslatest 14 Sept 2011
  31. Bourne Rivulet4 siteslatest 20 Apr 2006
  32. Main Kensey4 siteslatest 2 Aug 2024
  33. Yare4 siteslatest 17 Aug 2023
  34. Bure (central)3 siteslatest 26 Jul 2022
  35. Gannel3 siteslatest 20 May 2021
  36. Little River Test3 siteslatest 13 Aug 2025
  37. Main Claw3 siteslatest 9 Jun 2022
  38. Main Lew (Devon and Cornwall and the Isles of Scilly)3 siteslatest 19 Aug 2025
  39. Main Penpont3 siteslatest 2 Jul 2025
  40. Main Strat3 siteslatest 6 Aug 2010
  41. Main Yealm3 siteslatest 18 Aug 2023
  42. Menalhyl3 siteslatest 20 Jun 2018
  43. Mimram3 siteslatest 7 Sept 2023
  44. River Manifold3 siteslatest 15 Apr 2010
  45. River Glem3 siteslatest 5 Jul 2012
  46. River Keer3 siteslatest 8 Aug 2011
  47. River Stour Middle (East Anglia)3 siteslatest 4 Jul 2023
  48. Ruthern3 siteslatest 4 Jul 2023
  49. Tas3 siteslatest 2 May 2024
  50. Western Rother (Solent and South Downs)3 siteslatest 25 Jun 2025
  51. Ash (Hertfordshire and North London)2 siteslatest 22 Oct 2021
  52. Blackwater (Solent and South Downs)2 siteslatest 18 Sept 2025
  53. Bristol Avon main river2 siteslatest 19 Jul 2011
  54. Bucklesham Mill River2 siteslatest 24 May 2022
  55. Burn2 siteslatest 1 Jun 2026
  56. Cadnam2 siteslatest 17 Sept 2025
  57. Candover2 siteslatest 14 Aug 2025
  58. Caudworthy Water2 siteslatest 16 Jun 2021
  59. Cheriton stream2 siteslatest 25 Jul 2024
  60. Cod Beck2 siteslatest 24 Aug 2016
  61. Connon Stream2 siteslatest 11 Aug 2014
  62. East Looe2 siteslatest 15 Jun 2026
  63. Eshton Beck2 siteslatest 23 Aug 2006
  64. Kellacott Stream2 siteslatest 11 Sept 2025
  65. Lowley Brook2 siteslatest 20 Jul 2022
  66. Lumburn2 siteslatest 15 Aug 2025
  67. Main Cardinham2 siteslatest 21 Aug 2024
  68. Main Deer2 siteslatest 27 May 2022
  69. Main Kenwyn2 siteslatest 23 Jun 2022
  70. Main Plym2 siteslatest 4 Jul 2025
  71. Main Porth2 siteslatest 12 Jun 2015
  72. Main River Tone2 siteslatest 8 May 2013
  73. Ouse Tributaries (Kent, South London and East Sussex)2 siteslatest 5 Apr 2018
  74. Peover Eye2 siteslatest 28 Jul 2004
  75. Petherton Stream2 siteslatest 22 May 2012
  76. River Hamps2 siteslatest 8 Apr 2010
  77. River Box (Main Reaches)2 siteslatest 12 Jul 2021
  78. River Dean2 siteslatest 15 Aug 1996
  79. River Tat2 siteslatest 18 May 2018
  80. River Ter (Headwaters)2 siteslatest 9 Mar 2005

Distribution

By ecology region

  • Devon and Cornwall and the Isles of Scilly194 sites
  • Solent and South Downs108 sites
  • East Anglia100 sites
  • West Midlands31 sites
  • Wessex23 sites
  • Greater Manchester Merseyside and Cheshire19 sites
  • Yorkshire14 sites
  • Cumbria and Lancashire13 sites
  • Hertfordshire and North London9 sites
  • East Midlands6 sites
  • Lincolnshire and Northamptonshire2 sites
  • Kent, South London and East Sussex1 sites

Regions are the Environment Agency’s own ecology areas. Survey effort is not even across them, so a higher count can reflect more monitoring rather than more fish.

Provenance

Source and licence

  • SourceEnvironment Agency Ecology & Fish Data
  • LicenceOpen Government Licence v3.0
  • Source copy retrieved23 Jul 2026
  • Not assertedCurrent presence, abundance, access, permission or fishing quality
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