My recent experience! PPL SEP revalidation after several years non flying.
Applied for revalidation and conversion to EASA after passing recurrent training and proficiency check. All paperwork in order and posted to CAA with cheque for £78 as specified in their website according to the FTO I used. After about three weeks, received receipt for £78. A further couple of weeks and I phoned them. They said I owed them a further £80! Duly paid over the phone there and then. Another three weeks and I phoned again. Assured me it was all in order and should be issued at end of that week. I queried the extra cost saying that the website indicated that I had paid the correct fee originally. They said website must be wrong!?! Eventually, license arrived after another two weeks.
Just pleased to have it!! Two and a half months in total!
Good luck to anyone else out there!