Train Sim World 3 Wcml South - London Euston To Milton Keynes Central

Trains:
Class 390 (Avanti West Coast)
Class 805 (Avanti West Coast introduced late 2023)
Class 350 (London Northwestern Railway)

Routes:
Class 390 from London Euston to Milton Keynes Central stopping at Watford Junction

Class 350 from London Euston to Milton Keynes Central stopping at every station

Class 350 from London Euston to Tring stopping at every station

Class 350 from London Euston to Bletchley stopping at every station

 

You're more likely to get the WCML South with a 350 and an Overground variant. The 350s do NOT stop at all stations so wouldn't be realistic, given the DC lines handle much of the southern part of the line