The GRO has updated available digital images for death certificates. You can now order them up to 1957.
EDIT - well that's according to FMP, but I just did a search for a 1957 death and there's no option for a digital image in any of the results, so maybe it's coming......
I don't have time to investigate now, but didn't want anyone ordering an expensive version unnecessarily!
EDIT AGAIN- see next post!