WW2 CENSORED GB to PERU CZECH FORCES RAF 1943 MIXED POSTMARKS ONE IN ERROR

Czech Forces in GB; envelope from Muller, RAF Beaulieu near Brockenhurst, to Lima Peru; KG6th 5 stamps franking; “sanitised” postmarks on 4 stamps, one postmark on additional 1/2d stamp has divulged the origin, Brockenhurst!  British Censor tape.