Your license may change. it is the number the FAA looks at.
In other words .. You start with a uk ppl, get your 61.75. then later you add cpl, ir and me to it.. it is all oke .. As long as the number remains the same. it will be interesting to see what happens when converting to EASA.
Does the number change?
Also do not forget that the 61.75 only becomes valid after you have done a bfr.