3.3 pieces per litre
Falls of Dochart
2.4
Loch Lomond
Glasgow
>1,000
River Tame
Tameside
29.5
Ullswater
Lake District
Newcastle
84.8
River Irwell
Salford
15.1
River
Blackwater
Essex
Manchester
43.2
Llyn Cefni
Birmingham
76.9
Afon Cegin
Cardiff
7.6
Chester reedbed
84.1
River Thames
London
3.3 pieces per litre
Falls of Dochart
2.4
Loch Lomond
Glasgow
>1,000
River Tame
Tameside
29.5
Ullswater
Lake District
Newcastle
84.8
River Irwell
Salford
15.1
River
Blackwater
Essex
Manchester
43.2
Llyn Cefni
Birmingham
76.9
Afon Cegin
Cardiff
7.6
Chester reedbed
84.1
River Thames
London