16 September last.... hmmmm
Therefore it's a renewal required rather than Revalidation which is 'assessment and training through an ATO then an LPC with an examiner. Your flying hours are therefore not relevant. Once that LPC is complete, all the paperwork can be sent together to renew the SEP and convert the licence to an EASA one.
However, this is a quote from the UKGA website referring to the recent prosecution of Mr Hart....
Commenting after the hearing, Tony Rapson, Head of the CAA’s General Aviation Unit, said: “It should be self-evident that anyone flying an aircraft needs to be appropriately licensed for the type of activity they are engaged in. Unfortunately, a small number of people still think that the rules don’t apply to them and they can carry on regardless, despite the obvious risk to other airspace users and the general public. We will always take action against such people.”
Bit harsh for genuine '****, I forgot...sorry!' cases..... or is it?