I believe these are next GWR Mk3 releases, currently showing as due Summer 2023
GW09
Coach D : R4915E GWR, Mk3 Sliding Door Trailer Standard (TS), 48127
Coach C : R4895B GWR, Mk3 Sliding Door Trailer Standard Disabled (TSD), 48126
Coach B : R4915D GWR, Mk3 Sliding Door Trailer Standard (TS), 48125
Coach A : R4896B GWR, Mk3 Sliding Door Trailer Guard Standard (TGS), 49109