I think there's a guy operating a two seat Spit out of a field in North Wales, who offers/sells rides.
I met him and the spit recently when he flew into Sleap (EGCV) to conduct a number of joyrides from there. Now comes the painful bit, I think he was quoting £1,500 per half hour trip.
He and the aircraft were featured recently in Pilot, where all the contact info was included.
Hope that helps.