Things are looking up in Edinburgh again - VS seems to offer a choice of non-asian £50/£60 SPs just now. Pity I'm away this weekend 
I’ve seen a fair few of the Chinese/Japanese who are on VS. Never in Edinburgh, but Manchester way. Ok, you know it’s 100% B&S. But out of well over a dozen, a couple were oldish. Most were quite acceptable, a few crackers actually. I find the Chinese/Japanese are more easy to get along with that the Thai equivalent. Non of the weird Thai restrictions, like no touching nipples, etc.
I find it’s just a case of doing as much homework as you can, then walk if it that bad on arrival.