Perhaps you should email the CAA FCL and ask them what they would require from you to issue a new licence which I presume would have to be an EASA one.
You may be disappointed with what they require which may well be almost as much as it took to get the rating in the first place and the training to be done at an FTO not at your local flight school or club. As for age, well yesterday I was chatting to a grand old man of aviation who is 95. He'd done an IR renewal for me in a Seneca in 1997, when he would have been 78? He went flying well into his 80s. But then again, he is a master class in his own right.