I've been playing Pak128.Britain a bit lately, but unfortunately there is a little bug I have come across.
This bug is pretty much one that affects some earlier period steam engines. When I try to select one of these engines, there is a little issue that comes up, as seen in the attachment below.
I believe the issue is most likely the fact that some of these engines aren't "geared"-for example I can carry a decent load of passengers with a weaker LBSCR "Standard Passenger" engine than with the newer "Belgravia" type, and that is most likely because the latter engine is geared.
I know it might not be the world's most important bug but it would be good to see the gearing in some of these old beauties corrected, so that I can pull decent LBSCR loads with a Belgravia, or decent MR loads with a Class 22.