you'll need to do a full skills test (with examiner)
Negative - NOT the full end-of-ppl-course Skills Test - just a good club checkout style content with an examiner - a mini skills test. (no nav).
stiknruda: Why not use this as an excuse to do something different - find a school which will do an hour's night tuition tomorrow night, or have an hour's tailwheel with someone, have an hour's IMC, have an hour's aerobatics... but get it signed as an hour's training and then get the certificate signed too by an examiner before it expires.