[lgregg]

I was on a sleeper train a few years ago that would detach cars as it went along.

[isostatic]

The Scottish sleepers detach en route, you leave London and some coaches go to Fort William, some to Inverness, some to Aberdeen.

The later train does Edinburgh and Glasgow.

One of the few (only?) loco hauled splits in tr UK. DMU and EMU splits are very common - both ones where half the train terminates short (e.g. London to Birmingham via Northampton, or London to Holyhead via Chester), or they go to different locations.

[lgregg]

I'm not sure about the specifics, but it would drop cars in the station on the route. It was from Amsterdam to Prague via Berlin. This was back in 2013, so I'm not sure if things have changed.

[Symbiote]

The effect of the northern Scotland sleeper splitting, but being pulled by a locomotive, is the train reverses at Glasgow.

I found I woke travelling in the opposite direction, with the sun streaming through the now East-facing window.

[isostatic]

I think it depends on the day, sometimes th train runs via the west coast, sometimes via the east coast