Re: PPL Validity extended?
Nope - no writtens needed at all. Unless, that is, you didn't have a FRTOL before and now want one.
Yours is a 'lifetime' UK PPL, I imagine? My old 1968-issued one wasn't, but it sounds as though yours should be? Do NOT change it into a JAR-FCL PPL(A) - there's neither need nor requirement to do so. All you need to do is:
1. Get a current JAA Class 2 medical.
2. Do whatever refresher training you need.
3. Pass the SEP Class Rating Renewal Licensing Skill Test with a JAR-FCL PPL Examiner.
Send it all off to the CAA.