JasonNumber100: I'd recommend a good suntan lotion, preferably with a high factor. You'll be alright on St Andrews and St Georges, but those American courses sure can get hot
LOL Jason. Having lived in the UK for 10 years (some time ago now) I do recall playing golf in Surrey and getting sun burnt. Yes the only real summers day I can recall, the rest of the time it was better to have wet weather gear or thermals than a bottle of suntan lotion (the best before date probably comes before you actually use it).
Maybe the OP was referring to Aussie courses, looks like it could be a hot summer.