This is one of 3 commemorative covers to celebrate the 60th anniversary of VE day. The cover bears two cachets. One on a 1940 stamp, the other on the modern 'Castles'issue. The dates are 8/5/1945 and 8/5/2005.
Inside are a replica WW2 ration and identity card dated 8/5/1945.
Cover designs are Bletchley Park mansion, Churchill and 'Hidden Workforce'.