Full Circle by Mike Seabrook

The Gay Men's Press (GMP) title published in 1997. All copies are new, but show the age of their publication.
 
An RAF bomb-aimer in the Second World War, shot down over the Bay of Biscay, Brian Hales has already had to overcome a crisis of conscience when his lover Ronnie ended their relationship and went to prison as a pacifist. The risks of attempted escape are his next hurdle, bringing him into conflict with his superior officers in the prisoner-of-war camp where he is eventually taken. But his most disturbing experience is still to come, when he finds himself falling in love with a young German guard. 
 
In a new departure, Mike Seabrook has now tackled a historical theme and brought his keen insight for personal relations in an all-male world to bear on the complexities of friendship with the enemy.