I think you may mean this one:
Carry on England (1976)
I saw this film years ago on TV - it was pretty bad. Carry on England was part of a long series of comedies (the ‘Carry on…’ films) that began in the 1950’s but had deteriorated badly by the time this one was made. Not much good as a war movie, and not much good as a comedy either.
The IMDB site says this about it:
Carry on England (1976)
Plot:Captain S. Melly takes over as the new Commanding Officer at an experimental mixed sex air defence base
User Comments:It Is Pretty Bad
http://www.imdb.com/title/tt0074286/