The LMS needed an express locomotive to pull the Royal Scot express from London Euston to Glasgow Central so Stanier came up with this A 4-6-2 pacific design making it one of the biggest LMS locomotive designs capable of an average speed of 70mph the Princesses were some of the most revolutionary steam engines and further being developed to the LMS Princess Coronation class Two Princesses survive being 6201 Princess Elizabeth and 6203 Princess Margret Rose but since 6203 is on static display and 6201 is under going overhaul. Obtaining sounds for the them will be hard considering none of them run but you can use the chuff and cylinder sound can probably be reused it’s the whistle that might be hard. The pack will come to SoS Liverpool-Crewe pulling express passenger services Liverpool Lime Street I don’t know how many ran to Liverpool but 12 were built so maybe all 12 I don’t know LMS Princess Royal Railtours weren’t uncommon so there could be a variant with AWS and Speedometer If I was DTG and this was produced I think the same price as the class 700 would be the most reasonable
