I've posted this in the NAAFI to reach the biggest audience. I shall be spending a weekend in London in June (possibly the 8th and 9th) with the wife. She will be attending a teaching course during the day on Saturday and Sunday (teachers working on a weekend, who'd have thunk it?), so I will be left to my own devices during the day. So I'm looking for free or cheap things to do. So far I'm going to watch the changing of the guard at Big Lizzies' house on the Saturday at 11.30 (touristy I know. But I've never seen it), then I'm off to the National Army Museum (unfortunately the Imperial War Museum is closed until July due to renovation work). Not being a London native I'm struggling to think of other things to do. Obviously there are loads of things to do, but I don't want to waste my time making do with seeing something that is "ish", and then find out I missed something good. Any suggestions, other than getting smashed in a pub?