With all due respect, WUT?! £125 for a non-standard restrictive platform? And I can't even tell from the Scan listing if it comes with a power brick or if you have to buy that separately?
*How* limited is space? I'm a huge fan of SFF systems, but you'd have to have no space at all to be seriously considering something NUC or STX-like. If there's no room for an mATX tower on the floor, there's a few options in slimline desktop cases (they can sit under the monitor like it's the early 90s
) and there are a couple of low profile GT 1030s for < £70. With careful selection of component and dropping to 8GB of RAM (which will be plenty,
imo) it probably won't cost any more, either...