We have had our cat Mcgonagall for approx 3 years now and think he is nearly 9 yrs. just received a letter through the post from vets of a reminder of his annual vaccination and check up. There is a leaflet included about a well pet health screen, blood tests, costing £39.20.
I wouldn't bother if he seems perfectly fine. His teeth need checking at least annually now he's getting older, but I can't really see the point of blood tests unless you think there may be some sort of problem.