The design for HMS "Camden Lock" was based loosely upon the BT Tower in London. It is a 'Wendover' class ship and measures long by wide. The ship's registration is XH558 - the same serial number as the last flying Avro Vulcan bomber. Shuttlebay doors on the "Camden" are shown with the Union Jack embossed on them, which is part of the comic jingoism of the series. Camden Lock is the name of a lock on a canal in the real Camden in London.