Indeed, Whopity.
In theory then, since EASA Part-FCL is not supposed to remove any existing privileges
the IR(R) included in a converted UK (non JAR-FCL) CPL(A) or ATPL(A) should be non-expiring.....
However, the minimum validity must surely be 25 months from the date of conversion? Nothing to do with the date of any previous IR(A).