uk steam locomotives cab view

why some uk steam locomotives in side cab view are looking out left hand side.others right hand side. thank you.

Because Uk locomotives were either driven from the right hand side or the left hand side. The driving position varied from railway company to railway company and sometimes varied according to the date when the locomotive was built as well as who it was who was responsible for the locomotive's design.

thank you for your help. trying to download uk class 421. the class 421 i have download. the track appear inside the cab.thank you again.