wouldn't be so sure - you have to answer a couple of yes/no questions to even get to the application forms. One of them is:
"Do you have a full JAA/CAA ATPL? (If you hold a non UK issued ATPL, you will be required to change the state of licence issue to the UK)."
(my bolding of the text), I suggest you phone and check if you are not sure rather than answering an application question with an untruth!