Yes, and non standard width.
Merseyrail, Glasgow Underground and London Underground use narrow gauge track.
Lets get this right.
Non standard width and narrow gauge track are two different things.
The three rail systems quoted do indeed use a non standard width, that is body width or loading gauge but all three use the standsrd 4' 8 1/2'' track gauge.
My post was merely to notify other readers of this forum that
FGW▸ are not the only
TOC▸ suffering from a lack of rolling stock.