Too much of a muchness by adding something to all grids

near impossible ( and not in a good way!)

Not bad, but... "Thurso", a town (wikipedia tells me) with less than 8000 inhabitants on the other side of the world, is *way* too obscure. I'm also not really convinced by the "add key" stuff etc, when two make words, and two make two-word terms.

I thought it was great fun, quite innovative and got it on my first attempt with 8 seconds to spare, so hardly 'near impossible'. In response to Thurso, I guess the flag next to the grid links indicates that there might be some 'local' knowledge required. Thurso is well known in the UK as being the most northerly town. Good job, Keggs.

really nicely done but a little too tricky with red herrings also- just the additions would be sufficient, unless you're going for fiendish. (Also agree some answers were a bit obscure) but I loved this format. Please do more like this but maybe go easier on us!