They were all around from windowsills, in doorways and plonked by those little patches of soil you get around trees. Was I losing my mind at 1.30 on a Wednesday afternoon? Or was I being watched by some advanced surveillance device, making sure I would be back at my desk on time rather than nipping off home early for an afternoon of gardening?
Needless to say I was wrong on both counts as I spotted a Surveyor’s tripod nearby with a couple of rods propped up against a wall. There was also a chap in a high vis waistcoat laying another ball on a windowsill and I just had to ask him what they were all about.