[KingtonTramBasher]

Hmm, I'm trying to place where Maindy Place sidings are, memory doesn't bring up any immediate results. I'll make enquiries and see what I can find out though, I'm rather curious myself!

EDIT: Google Maps produces Maindy Road, Cathays, Cardiff. I know where you refer to now, the old Cathays depot.

I've not been past there for many a fine year now (2006 if memory serves and bugger all was there then), I believe they were building student accommodation there for September 2006/2007 when I went past. Google Maps doesn't collaborate with that though. Weird.

Interesting question though about whether any potential pollutants would be left behind. As I said above, I'll make enquiries elsewhere. Might be worth searching Fotopic for Cathays and seeing what it comes up with.