BillieBob what makes you think a current RF can not train, test and examine for a LAPL? They can do the same for an EASA PPL
Existing RFs were given from 17 Sept 2012 until 2014 to become ATOs (if they wish).
During this period they could continue to provide the same courses as they did previously (PPL, Night, IMC, etc).
LAPL did not exist prior to 17/9/12 so could not be "granfathered" in this way.