I can confirm the last message from Beagle. The CAA has said / written that (once you have an EU PPL) hours flown on an aeroplane (whether an aeroplane within the scope of EASA airworthiness regulations or on a 'non EASA' - i.e. Annex II - aeroplane) can count towards maintaining the recency requirements of your EU licence.
I took up this point with both EASA and the UK CAA earlier this year. The wording in part FCL (now Aircrew Regulation) is generic on this point, using the words 'category of aircraft', which means aeroplane, or helicopter, or glider or balloon (the respective licences) without qualification as to whether the said category was an 'EASA' or 'non-EASA' aircraft.