Recently moved down towards the Blue/Southwark Pk Rd way having rpeviously been near the luxury of Long Lane Fish Bar. We have not yet discovered a more local rival but a 20 minute walk is a bit far to go and get a fish supper.
Masters is great. I also like Olleys on Gt Suffolk St. I think it went downhill a few years ago, but it's on good form at the moment. Neither of those are too close to you though, sorry. Maybe you need to move house again ;0)
St James' Fish bar on the junction of Southwark Park Road and St James Rd has the freshest cod I have ever tasted. Not shy on portions either!
Highly recommend a Friday-evening visit.
Blue Anchor fish bar is a close second.
Can I also take the time to moan about Johnny's Fish & Chips - it's now arse. When he had the small chippie next door he was fab - now he does burgers and kebabs he is, well, arse - dry fish and well over priced.