The MEP skill test counts as the hour with the instructor as does ANY other JAA skill test.
However the other requirements still need to be met if revalidating by experience. The licence needs to be signed BEFORE the rating expires other wise an LPC is required in an SEP.
Revalidation by flying experience
A SEP (Land) and/or TMG class rating can be revalidated
by flying experience by producing logbook evidence to
an appropriately authorised JAR-FCL Examiner, before
the rating expiry date has passed, of the following flying
experience completed within the 12 months preceding the
rating expiry date.
12 hours of flight time in SEP or TMG aircraft as
appropriate to include;
i. 6 hours as pilot-in-command;
ii. 12 take-offs and landings;
iii. a training flight of at least 1 hour’s duration with
a FI(A) or CRI(A)* who must countersign the
appropriate logbook entry (see full details below).
*The instructor must be authorised in accordance with
JAR-FCL to instruct for the JAR-FCL TMG or SEP(Land)
rating as appropriate. UK QSP only may undertake the
instructional flight with a UK Military instructor. This
training flight may be replaced by any other aeroplane
proficiency check or skill test for an instrument, class or
type rating (as defined by JAR-FCL) with a JAA qualified
Examiner, or by a flight test for the issue/revalidation or
renewal of a UK IMC rating.
• If revalidating by flying experience, and providing
the examiner signs the Certificate of Revalidation
page within the 3 months prior to the rating expiry,
the validity of the revalidated rating will be calculated
from the date of expiry of the preceding rating.
• If the licence contains both SEP (Land) and TMG
ratings, the revalidation by proficiency check
requirements above may be completed in either
class or in the case of revalidation by experience in
either class or a mixture of the classes, and achieve
revalidation of both ratings.
Note: A SEP (Land) class rating cannot be revalidated
or renewed by passing the Skill Test for the initial
issue or renewal of a TMG rating and vice versa