Looking at what makes up the UK Exclusive_economic_zone (EEZ) it totals 6,805,586 square km. But of these only 773,676 square km are around UK proper and 426 around Gibraltar. The vast majority are around British Overseas Territories, which are not part of EU territory. E.g. 1,449,532 square km of EEZ are around South Georgia and the South Sandwich Islands.
Does the EU Common Fisheries Policy (e.g. fishing quotas) cover all those non-EU British Overseas Territories?