Fiendish! The only link I could see for myself was the 'House' one. I'm no good at anything which resembles an anagram.

Excellent! Unlike Jane Hunter, I spotted the 'binaries' group straight away, but binaries was the last one I spotted for it. Then I got the 'octopus' group, took a while to find the next one(which I really liked), and only spotted the 'house' link in my last group, as I was filling out the links.

Really enjoyed this one. Funnily enough, the group I found by accident and couldn't define was the only one found by the author of the previous comment! Shows how different we all are!

Got the groups all right but it didn’t accept one of the connections. I know this happens sometimes, but I think the system ought to be able to recognise that “Dr” means “doctor”!

Doc Martin. Martens are tree dwelling vermin.

Dr Martens are a brand of footwear.

This is one of the best grids for a while. Loved all the groups.