@NielsKok5 Hi Niels, I have managed to get to the bottom of it today - it turns out a colleague had deployed an old ADMX at some point, and there were a couple of legacy policies targeting the RDS which no longer exist. New GP applied and works perfect! Thanks for your responses.
@RahaSidharth@CPiddyMFC@PearsonVUE I’ve just emailed the link you have just sent to Pearson Vue to show it’s not just me, there is no point getting them to reschedule at the minute if we’re just going to have the same issue