Someone more conversant with the ins and outs will, hopefully, give a better answer but:
As your friend has no EASA or UK recognized qualification she cannot use this (even if she has hundreds of hours) to gain an EASA or UK Licence.
However if her training for the BB was conducted by a JAA qualified Instructor then any training she received would count towards the issue of an LAPL or PPL. She would, of course, need to prove such training to whichever Flying School she went (Training Records, Signed up Log Book, etc) who would then only need to ensure all syllabus items had been covered, and the required course hours flown before considering putting her forward for test.
Should save some flying hours, depending how current she is. But she will also need to sit, and pass, the Theoretical Knowledge exams.