Duke of Northumberland fishing evidence · Hertfordshire and North London
What fish are in the Duke of Northumberland?
Monitoring has recorded 23 species across 6 surveyed sites on this water, between 2000 and 2024. These are survey records with dates. They do not establish what is present today, that the water is fishable, or that you have permission to fish it.
River evidence passport
Four signals, kept deliberately separate.
The passport shows identity, survey breadth, evidence freshness and trip constraints without turning unlike facts into an opaque “best river” score.
01 · Identity
Duke of Northumberland
EA ecology area
Hertfordshire and North London
Waterbody IDs
GB106039023030 · GB106039023480
Catchments
Duke of Northumberland
02 · Survey breadth
6 sites · 26 events
23 positive taxa aggregates are shown. More survey coverage is not a fishing-quality verdict.
03 · Freshness by site
Latest 10 Oct 2024
Within 2 years
0 sites
3–5 years
2 sites
6–10 years
4 sites
Older
0 sites
04 · Trip constraints
Permission is not established
Survey evidence carries no access boundary, permit, opening status, catch forecast or live safety signal. Resolve each before travelling.
Ordered by how many sites on this water recorded the species. A species not listed has not been recorded by these surveys — which is not the same as being absent.