I feel like over the last few years I've been noticing public things just getting more and more dirty. Road signs, bins, railing etc all seem to be covered with this grey film/lichen. I see it all over the UK, so it's definitely not just my local area. Some friends and I were in Newcastle for a hen weekend recently and even the Millennium Bridge was in need of a clean. Is this just a budget cut thing and there used to be a hidden army of council workers cleaning things before? Or the result of more pollution/climate change? Or maybe just a big drive to upgrade things a few years back and it's all starting to look a bit tatty?