Clacton Aero Club are undoubtedly one of the most experienced tail-dragger training clubs in the UK and they have been doing it since the mid eighties in the PA-18. They wrote the manual, and then took it a step further with their "Farm Strip Special," and over the years they have taught more pilots in the art of tailwheel and strip flying than any other organisation.
One thing you will not get at Clacton is an instructor who is there for his or her own hour building benefit. If you are lucky enough to get booked in with Jo you will get the most experienced taildragger instructor/examiner in the UK.
I do NOT work at or have any interest in Clacton.