From the right-wing Daily Telegraph, not exactly Foot's ally:

Mr Foot, then Labour leader, laid his party’s wreath wearing a short dark coat, in contrast to the long black overcoats worn by other men in attendance...But according to Mr Foot's official biographer, Lord Morgan, the coat was not a donkey jacket – which would have leather shoulders – but "a short, blue-green overcoat" bought for Mr Foot by his wife, Jill at considerable expense.
During the Remembrance ceremony, the Queen Mother is said to have complimented Mr Foot on the garment, telling him that it was "a smart, sensible coat for a day like this."

So perhaps we can now put this lying piece of Iains-idiocy to bed once and for all.