They had sort of a limited version of this deal during the holidays, when several authors opted into a backlist sale at 1GBP/book. I picked up a few books I was missing, of course...
Generally speaking, Angry Robot has good taste. They sell DRM-free*, quality ebooks in the speculative fiction arena, which is exactly what I like.
* Some of their resellers, such as Kobo, do inexplicably apply DRM. If you want to be sure, buy directly from them at Robot Trading Company.