I enjoyed it. I didn't solve the whole wall, only two lines, but I saw all the connections once the lines were sorted. I'm not sure it's a 'fiendish' one though.

Got the Sutton group and the Rock group quite quickly. Failed to separate the other 2 groups - should have spotted the links, or just realised there were 4 short and 4 long words. Got all 4 links in the end. Tricky, because of the red herring place names.