Another three British soldiers have been killed by an Afghan policeman whilst they did their best to pass on their skills to the Afghan forces.Two served with the 1st Battalion Welsh Guards and one with the Royal Corps of Signals. A fourth British soldier was injured in the shooting but was not seriously hurt.Mark Cann, spokesman for the British Forces Foundation charity, said soldiers were worried about how Afghan colleagues, particularly police, were vetted."It makes everyone a little more cautious," he said.The latest deaths mean a total of ISAF personnel have been killed so far this year and of these ( since 2010) 14 were British troops.Any notion that Afghans, in general, think that NATO troops - particularly British and American - are there to help them is nonsense.

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