Full Sutton near york, has a tiger moth, and although they dont advertise PPL courses in the tiger moth, im sure if you asked, they would let people do PPLs in it, and Sherburn near Leeds has another, which they use for 'tiger moth experiences'
I remember the guy there describing it as 'an uncomfortable noisy piece of !!!!!' after having done 3 hours worth of 20 min trial flights.
NB