To the best of my knowledge, in the time the DT has been featuring these puzzles, this has only happened once before - well over a year ago if I recollect correctly - now twice in 3 days! must be a new setter who can't be bothered to use all the letters. I don't like it, but, if they are going to do it, they should indicate that there are unused letters, and they certainly shouldn't be assigned to numbers in the solution which didn't exist on the original grid as with Thursday's puzzle; although, having said that, I must admit that I only usually bother to look at the published answer when these oddballs turn up.