If there's one fic I would recommend to people from the Merlin BBC fandom, it would be
The Week the Sassy Pose Came To Camelot by
magog_83 Even for those not in the fandom. It's a crack fic, but it's worth the time. If only to read the captions on the pictures from Enid Blyton novels.
'The horn of Gondor was no match for the Giant Boy' indeed.