Tel him to complete an
SRG 1104 and he will get a JAA CPL on payment of the appropriate fee. There is no age limit. He will also be able to renew his UK ATPL for use on Annex II aircraft if he wishes.
The reason he will not be able to get a JAA ATPL is because he doesn't hold a current multi-pilot Type rating, the age thing is a bit of a red herring.