Caledonia Works GWR "King" is already a highlight, but BMG's "Castle" is still a step higher. BMG released their GWR/BR(W) "Castle" Class 4-6-0 and it's a beauty. One expects no less from BMG. Too many variations to list here, with lots of special features, well worth the higher price. I just put a consist somewhere in a historic place these loco's serviced. Lots of consists are pre-made, including with the preserved locomotives, fully fitted for today's mainline excursion service. There are lots of interesting 'cinematic cab views' at the running gear, including the inner crankshaft and valve action. You'll find some nice evaluation videos on the YouTube. X-mas has come early for fans of British stuff with all the main excursion engines now covered by BMG, Caledonia Works and Victory Works in lovely recreations. Oops, forgot to add the store page with all the info: https://www.bossmangames.co.uk/gwr-brw-4073-castle-class
I have been looking forward to this, my favourite class of steam engine. With this, the fantastic VW 9F and the recent CW releases (I am still having fun with the Metro tank) it is a great time for TSC steam.
If you look at the BMG Webpage it shows three routes are requirements for scenarios - so there must be at least three The Manual is also on the same page and that might have more info