Zulu,
Sadly, the UK CAA will not issue you a JAA ATPL(H) based on the AW 139. They do not recognise the 139 as a multi-pilot helicopter. They will only issue you an ATPL(H) if you have a multi-pilot helicopter type rating. If, however, your company ops require that the 139 is flown multi-pilot then a note from your mum should do the trick.
With all the other documentation required, they will, however, add the type to your licence.