The info you need is in
LASORS Sections C5.1 and F.
From 5.1
If the holder of a UK National or JAR-FCL pilot’s licence has not held a valid Certificate of Test, Certificate of Experience or Certificate of Revalidation for any type/class rating that has expired by more than 5 years** they may not have their licence re-issued until such time as an appropriate valid medical certificate and Certificate of Revalidation are obtained. Applicants may either renew an existing rating within their UK or JAR-FCL licence or may wish to transfer a type/class rating that he/she is currently flying under the privileges of their non-UK ICAO licence. Renewal of appropriate ratings or the transfer of type/class ratings is specified in Section F.