The catalyst for this discovery was Red Rat's RFI on policing in Iraq, thanks to Google for showing this book which slipped past me.

'At the End of the Line: Colonial Policing and the Imperial Endgame 1945-80' (Studies in Imperialism) by Georgina Sinclair, pub. 2010; which has rave reviews and includes several hundred interviews with colonial police officers:http://www.amazon.co.uk/At-End-Line-...S05DRQQY225V9D

Just ordered a copy, so an update in a few months time.