Morning mate.
Glad to see that you're recovering well.
I had my op about the same time as you, and I'm still having 3 monthly PSA checks. Having said that a friend, who had the same op at the same hospital, after a year was only tested every 6 months.
I think it might vary, dependent on the histology of the removed prostate.
I think NICE guidelines state checks should be at least every 6 months for the first 2 years.
All the best.