There is an annual open day at RAF Cosford on the Sunday closest to D-day, when other parts of the base as well as the museum and its shop are open. Its a training base where they do everything from ab initio pilot training on Grob Tutors through engineering and IT skills and they even train chefs for the catering service. On the open day you can fly into RAF Cosford in a World War II Dakota (DC-3) from Coventry Airport (35 miles). One of the Dakotas which they use is painted in RAF colours and the other is painted as a post-war civvy airliner. I've done the trip in the Dakota the past two years and already booked for next year, when I shall definitely be wearing my new RAF kilt.