British Forces South Atlantic Islands: A Permanent Joint Operating Base. The British garrison is centred around RAF Mount Pleasant (the Mount Pleasant Complex) and includes commitments from all branches of the Armed Forces, most notably; No. 1435 Flight RAF (4 x Typhoons), No. 1312 Flight RAF (one Voyager and one Hercules), a Type 45 destroyer or Type 23 frigate, HMS Clyde, and 1,000 British Army personnel. There are also early-warning and airspace-control radar stations at critical locations, and East Cove Military Port, a deep-water port operated by Naval Party 2010.