Aha, excellent. Thanks chaps. @martinb, does 4pm ish qualify as in the day? I'm assuming you mean office hours.
My own stupid fault. I paid Chiltern Bike Barn £5 to remove this (6 speed) f/wheel from a wheel to put on another wheel, then completely ignored a friend's advice to take the opportunity to service the hub because I was too eager to put it on and too scared to attempt a hub service myself. And lo! after putting it on the bike I discovered there is play in it. So I could spend another £5, which means I might as well have bought the tool in the first place, a fact that annoys me as a. I've been stupid and b. it would be a waste as it would sit in the tool box never to be used again.