Going through my photos from last Monday I was amused to see these two:
Wandsworth Bridge, 13:43
Putney Bridge 14:54
When I edited the first one, I had a passing thought that I don't seem to see many cement mixers these days. Of course it may be that there is, like, one form in South West London that has many many cement mixers. But it amused me to see similar/identical cement mixers on different bridges, more than an hour apart.