There's no better simulator for RYR assessment than our brand-new B737-800 simulator, which is 20 minutes from London Stansted
Boeing 737-800 Flight Simulator - Virtual Aviation
Proper Boeing simulator with Boeing flight dynamics model and Rockwell Collins EP-8000 collimated visuals (no Microsoft!).
There must be a lot of RYR sim assessments taking place right now, as we've got a few candidates in the simulator for preparation each day at the moment.
Don't shoot me down for promoting please, as just responding to a genuine question.