I know of a couple of operators who use FMS approaches, one i believe has submitted the approach to the CAA. Some of the FOI also fly public transport for the same operator to remain current. So i presume it is being asessed by the CAA.
I hope we eventually catch up with the US on the approval of GPS appraches. If done properly with a FMS I personally think they are much more accurate than for instance a NDB approach.
