I have just checked mine and they are from 1997.
Does anyone have any recommendations for a +4 or for tyre centres who can handle wire wheels on the Bucks area?
John, not in Bucks but depending on where in Bucks you are, these may be worth considering: - Micheldever Tyres, Winchester, 1962 774437.
They have a good reputation and I know a fair few people who travel quite a good distance to use them.
I personally use a board member, Ben, who co-owns a small auto business called Riemans. While not a tyre business, he has excellent contacts and I've found his service and prices are hard to beat. The downside for you is that he is based in Oxted Surrey.
I'm happy to pass along his details if it helps someone? He did offer us a winter tyre deal last autumn and I'm sure would be happy to help again. He is also always on hand to offer free advice and his tyre contacts can usually answer any size/rare spec question.