Ended up going back to same swim that I had my perch from the other day and having opted to fish for perch I just took my small landing net and didn't bother with the unhooking mat. This turned out to be a big mistake...
As I had a couple of deadbaits in the bag thought I'd pop one on the spare rod whilst floatfishing for perch on the other.
The end result being that I hooked a pike too big to fit into the net. Well, I did get about 1/2 of it in before it got out again and came off. Estimated at about 20lbs I was more than a little gutted.
No perch but did snare a barbel of just over 8lbs on lobworm (17:20) which I'm sure did appreciate the use of my unhooking chair...