I would advise doing the class 2 medical. A LAPL medical is limiting in that it would restrict your choice of training organisations to ATOs only. The majority of flight schools in the UK are currently just registered facilities and are not able to train for the LAPL. They all have to upgrade by 2015, but most will leave it until the last minute, in the hope that the CAA will realise the damage the additional cost and bureaucracy will do to small schools.