You don't have a frozen ATPL or any other sort of ATPL for that matter, as there is no such thing. You have a CPL/IR. This "frozen" rubbish was invented as a marketing phrase by Oxford I think it was, or if not Oxford some other flying school.
When you meet the requirements for an ATPL, you can bin your CPL and apply for issue of an ATPL. At that point you can begin to enjoy the benefits outlined by potkettleblack!