There isn't any regular prostate testing in the UK, for any age. I'm sure you could find someone to do a physical check for free though.
What's your point?
Erm...
Prostate Cancer Risk Factors | Prostate Cancer UK
Prostate cancer risk factors include age, race, family history. Genetics, such as having a BRCA1 or BRCA2 gene variant, can also be a factor. Read more to find out whether you’re at risk of prostate cancer.
If you're over 50 and you're worried about your risk of prostate cancer, you might want to ask your GP about tests for prostate cancer. If you're over 45 but have a higher risk of prostate cancer – because you have a family history of prostate cancer or you're a black man – you might want to talk to your GP too.
The point is why 50? Why have they put that age in there? Do you have any idea why?