The song being played at the fashion show is 'She drives me crazy' by The 'Fine Young Cannibals' who's lead singer Roland Gift played the thief in the episode 'For Tomorrow We Die'.
Nigel Terry (Gabriel Piton) played Arthur Pendragon in Excalibur (1981). His countryman Nicholas Clay, who played Lancelot in the same movie, also appears in the series (Unusual Suspects (1997)).