Exams lasted for 7 years in those days <fx: swings lamp
>
But - you have a CPL issued, which, based on the length of time looks to be an amendment 3 licence, which is now an ATPL(H)(VFR). Your next step would certainly be to contact the CAA quoting the rules above. You need their answer in writing to guard against the very circumstance you mention.
I believe you need to speak to Barry Mooney.
Phil