Actualy in Britain it's rated 12A ("any children under 12 must be accompaned by an adult"):
http://www.bbfc.co.uk/website/Classi...C?OpenDocument
Needn't worry though as Mrs.Henderson Presents was given a 12A cert back in 2005 and that contains some tasteful full-frontal nudity (male and female) and plenty of bare female breasts and buttocks (it is also pretty amusing and entertaining movie in it's own right), so maybe Lady Godiva will deliver after all.