St Trinian's

 was a film mentioned by James Willaker. A character named Flash Harry featured in it. (PROSE: Only Connect)

Behind the scenes
Jodie Whittaker appeared in the 2007 film St Trinian's as the character Beverly, and reprised the role in the 2009 sequel St Trinian's 2: The Legend of Fritton's Gold which also starred David Tennant as the villain Pomfrey. Whittaker has said that she was "gutted" that she wasn't in any scenes with Tennant or got to meet him then.