I have kept an eye on Thai prices on AW in the West Midlands. I usually go FS (but basic vanilla service i.e no dfk, owo or cim). Prices are definitely creeping up over the last 6 months from standard was £70 (rarely 60) to now £80 (sometimes still 70) for 30 minutes. I tend to rely on AW rather than VS so can't comment on VS prices