Bit of a panic yesterday as I opened up one of the Border Raids which had missed a couple of tiles, and it robbed me of one of the tiles within my max square. Down to 29x29! I thought I'd spotted all of those.
It was less than ten miles away, and a good excuse for a bike ride in the drizzle.
With some solid work the last couple of weeks, and that stray tile, my square is back to 39x39, and the cluster is a satisfying 3570. I've got a pincer move going on the Leeds-Bradford conurbation, but I'm not in a rush to ride around there. A winter project, perhaps, and hopefully the cluster will be up to 4000 by the end of the year. A 40x40 square is just a few tiles away, which I might do before PBP.
My golden rule (which I usually manage to stick to) is that it should still be a decent bike ride.