Anyway, congrats to Whirly for spotting the problem
Much as I like to accept congratulations, in this case it was my co-pilot Paul who spotted it. I was sitting there looking at the map, since it was his leg to fly. But we're both pretty careful about pre-flight checks, and after this, I'll be even more careful. It's so easy to think, deep down, that you just parked the aircraft five minutes ago and it was fine, so it'll be fine again. Now I know that's not necessarily so.
