Couple of recent acquisitions. A pair of 1954 dated 'Trousers, Combat, Sateen, 1953 pattern'. These, I believe, represent the last variant of the orignal 1951 'Trousers, Combat' (the middle versions being the 'Trousers, Combat Sateen' [usually dated 1953] and 'Trousers, Combat Sateen, 1952 Pattern'), but still retaining the nice 'Swift' brand double zip.
Also, for interest, a pair of very early dated 1960 Pattern trousers by the little known manufacturer 'Manclark & Son'. Don't recall seeing any other production runs from them with a different contract number so this may well represent their only efforts for the 1960 pattern line.
Interestingly the lining has disappeared in the 1953 variant (I believe both the 1951 and 1952 variants retained linings) but is back again for the 1960 pattern issue. The inclusion of the lining really does make for a very heavy pair of trousers which must have tripled their weight when wet and taken an age to dry out! No wonder so many squaddies used the old denims, or later lightweights (if using the similarly lined 1968 pattern trousers), whenever they could.