Otherwise just do the flight in an airplane.
If only it were that simple! I have to book an examiner with at least a months notice and then hope that the weather is suitable (at least a 1000' agl cloud base to cope with unusual attitude recovery and forced landings). Then hope that the two local airfields that have both ILS and RNP approaches can accept us for training which is frequently impossible as commercial traffic and other training flights put great demand on their facilities. My rating was due by the end of this month and yet again I'm now going to have to let it expire before renewal (and yes, I have been trying for the prior three months).
The CAA are wrong to block the use of sims for this rating as if they allowed them, not only could the rating be renewed with guaranteed consistency, it would allow the introduction of failures in flight that cannot be conducted in the air. Surely that's got to be an improvement in safety?