This is an adventure story which didn't happen, but might have done. World peace has lasted for 50 years, since Britain's fall in 1942. Then war erupts in the Middle East. The Free Brits, exiled in the US, recruit volunteers to infiltrate the home country and raise the flag over Windsor Castle.
Used availability for John Bowen's No Retreat
June 1994 : UK Hardback
June 1995 : UK Paperback