The TFL S7 Stock Modpack provides London Underground S7 stock trains. There are two wagon types: control cars (DM) and intermediate cars (NDM).* This mod was made by Mainote and now it's been migrated to Advtrains Supplemental.

A highly requested feature for this mod would be to make the destination display work with any text, or at least something like the subway wagon.

The model may have a shading error or flipped normal somewhere, as some sides appear strangely dark.

Finally, beware that the collision box on these wagons is rather small so you may need to contort your view to weird angles to right-click the collision box and escape the train.

*The real S7 stock trains have DM, M1, M2 and MS cars with slightly different seating plans, but this wouldn't translate well to minetest anyway. Ref.