In that case I've either had prophetic dreams of the future of TV or more likely I'm just htinking of a different show. Though having actually stopped being so lazy I suspect http://www.ukgameshows.com/page/index.php/Street_Cred_Sudoku is what I am thinking of which implies it was broadcast first ok UKTV G2 last year. SO I guess this is a second series or something? I dunno. I'll leave you to do the rest of the google and wikipediaing and the rest.