DWYB (Drift what you brung) at Santa pod raceway.
http://www.dwyb.co.uk/ . Set up extremely well for begginers and advanced drivers alike. Seperate course for begginers with helpful marshalls who will give you tips if you identify yourself as a noob.
Driftracing at Lydd kart track
http://www.driftracing.co.uk/ . Technical track for more advanced drivers, great circuit.
Crail raceway in Scotland. Details on drift days there normally appear on TrampDrift.
Oulton park. Expensive begginers day on a purpose built low friction track on the grounds of the Oulton park circuit.
Javellin motorsport allow drifting at a couple of venues (Barkston Heath for sure)
Norfolk arena, Essex arena, both banger ovals that do drift days occasionally.
Driftuk (these are the people who do drift skool, drift practice and BDC licencing days)
There are more but I am bored of writing.
Proof beyond doubt that there is a drift day available for all, you just need to look harder. No excuses for drifting on the streets.