UK troops begin Iraqi withdrawal

British forces will officially begin their withdrawal from Iraq on Tuesday as the UK's top general in the south of the country hands over to a US general.Major General Andy Salmon will transfer authority for what will become Multi-National Division South to US Major General Michael Oates.Most of Britain's 4,000 troops will leave by 31 May, the official end-of-combat date.About 400 will stay after that, either in HQ roles or to train the Iraq Navy.