Thumper,
You should find what you need here -
http://www.caa.co.uk/srg/licensing/f...sp?groupid=292
I think you'd have to do all 14 JAR ATPL ground exams and take the CPL/IR flight test but would only be required to do training 'at flight schools discression' for the tests - but I've also heard that some dispensations are possible for lots and lots of hours.