Crooks in Cloisters is a 1964 British comedy film directed by Jeremy Summers and starring Ronald Fraser as 'Little Walter', the leader of a gang of forgers, including Barbara Windsor as 'Bikini', Bernard Cribbins as 'Squirts', Melvyn Hayes as 'Willy', Grégoire Aslan as 'Lorenzo', and Davy Kaye as 'Specs'. Wikipedia