There are quite a few similar ones, this one looks to me like a Willow Beauty (Peribatodes rhomboidaria), however saying that I've never seen one that looked so 'white', very light grey but not this white. Well done investigating further. The Feathered Beauty are lighter more often and are very similar to the Willow Beauty, but when your photo is viewed large, the antenna feathering stops well from the end, where in Feathered it continues (all be it small) to the end. One other good indicator would have been to pot this moth and look at the underside. Willow Beauty will have a square looking mark (light patch) at the apex of the wing (on the tips).
Hope this is helpful
Edit: Mike and I must have hit reply at the same time...lol At least we agree