Thanks to kelk72 on MSE. Woolies have a glitch on their bedding...king size duvet Sophie/Hannah/Amber King and Double for £2!! I've just ordered 2 Sophie Kings size for £4 and matching pair of pillow cases for £1 !!
Unfortunately didn't get the free delivery code to work (some people have been lucky!!) but still 2 duvet sets for £10 delivered is not bad!