650 hrs if you
hold a PPL
250 hrs if you
hold a CPL and IR
I'd love to see the look on a overseas ATPL holder's face when the UK ATO tells them they have the experience of a PPL holder…'err, that'll be 650 hours of study for your subjects old chap. Come back when you're finished and we'll see what we can do'.
Ref: CAP 804 Part 1, Appendix 3 to PART-FCL, Part H - ATP modular course - Helicopters
This just gets better.