No you didn't, read your reply again carefully.
You said, "....unless its multipilot (eg London)", inferring that you are talking about single pilot operations.
You then said, "its annual until 60, when it becomes 6 monthly." It's not annual until 60, it's 6 monthly - and you can't fly if you are over 60.
but note there is no upper age limit stated on the medical certificate
Correct, but you are restricted by other regulations.