My regular DZ is Hinton, it's the closest one to London I believe. I'll be going there at the weekend, if you're still here and the weather is nice send me a PM and I'll give you a ride. Providing you aren't in Croydon
If you don't want to trust a stranger (understandable) there is a national express coach that goes to Banbury station for £30 return, from there you can get a cab for about a tenner to the DZ