Can a LAA coach complete refresher training required for a LAPL?
The recency requirements for the LAPL are on a rolling Revalidation basis. See CAP 804 Section 4 Part B Subpart 1:
Therefore, there is no class rating expiry as such: providing you fulfil the criteria on the day you intend to fly then you may act as Pilot in Command. If you fly with a coach over 24 months since your last flight test or flight with an instructor, you will have completed the one hour as required in (a)(2) and providing you have completed 12 hours PIC in the last 24 months on the day you intend to fly then you're good to goFCL.140.A LAPL(A) — Recency requirements
(a) Holders of an LAPL (A) shall only exercise the privileges of their licence when they have completed, in the last 24 months, as pilots of aeroplanes or TMG:
(1) at least 12 hours of flight time as PIC, including 12 take-offs and landings; and
(2) refresher training of at least 1 hour of total flight time with an instructor.
(b) Holders of an LAPL(A) who do not comply with the requirements in (a) shall:
(1) undertake a proficiency check with an examiner before they resume the exercise of the privileges of their licence; or
(2) perform the additional flight time or take-offs and landings, flying dual or solo under the supervision of an instructor, in order to fulfil the requirements in (a).
Any LAA coach may complete the refresher training listed in FCL.140A (a)(2) if you have the required experience, and dual training/supervision as required under FCL.140A (b)(2) if you do not comply.