Margaret Thatcher and the Loch Ness Monster
The Times of London reported in January that according to recently released government files from the 1980s, the administration of Prime Minister Thatcher appeared seriously concerned that poachers posed a threat to the Loch Ness monster (if and when it revealed itself).
(Also in those files, as reported in News of the Weird in 2004, was a letter from Swedish officials seeking advice from the Nessie-experienced British on protecting Sweden's own underwater Lake Storsjo monster.) [The Times (London)]