Camargue,
I somehow doubt that they'd let you hire a tailwheel single seater, without ample experience on tailwheel, and training you / checking you out on different aeroplane types which may well prove more expensive than the C150/152 option. ( not that it isn't outstanding training, with incredibly skilled mentors / instructors and expand your experience which will increase your stick n rudder skills by 500 folds [or more] ).
But cheaply do hour building? I am not so sure....!
Also ChampChump is right - they're at Damyns Hall, near London now. Lovely airfield is anyone wants to visit?