Fishmonger

Fresh fish shops: The River Farm Smokery, on the A1303 at Bottisham (fresh fish Thursday to Saturday only; smoked fish available all week).
Loch Fyne restaurant fish counter.
The butcher's in Histon (mostly advance orders)

Frozen fish shops: Seoul Plaza, Mill Road +
Seeong Hee's Oriental Shop, Mill Road next to Romsey Post Office +

Fish vans/stalls (specific times/days only): Grantchester St/Eltisley Avenue corner, Saturdays before noon. From Peterborough
Portland Arms, Mitcham's Corner, 8.30am until 3pm Wednesday. L F Brigham, Lowestoft, 07799 338813
Market stall, Cambridge Market Square. Saturdays (and some other days). From Felixstowe. +
Market stall, St Ives Market. Saturdays, also visits Huntingdon market

Supermarkets with fresh fish counters: Sainsbury's, Coldham's Lane
Tesco
Waitrose, Trumpington
Asda, Beehive Centre
Morrisons, Cambourne +