There currently is one option to travel by night train from Aberdeen (United Kingdom) to London (United Kingdom), taking between approximately 10 and 12 hours: Namely the Highlander SB (A) operated by Caledonian Sleeper.
The Caledonian Sleeper connects London with various destinations in Scotland and offers a comfortable overnight travel option. The train provides comfortable sleeper cars, but also seats for budget-conscious travelers. There are basically two lines: the Lowlander and the Highlander. The Highlander travels further into northern Scotland while the Lowlander serves destinations including the Scottish metropolis of Glasgow.
There are three different sleeper car options: the Classic Room with bunk beds and washbasin (toilets at the end of the car), the Club Room with identical layout but with an additional private bathroom with toilet and shower, and the luxurious Caledonian Double with a proper double bed and private bathroom. Seating cars are also available for smaller budgets.
With the Club Car, the Caledonian Sleeper has a restaurant car offering an extensive selection for dinner and breakfast. Particularly popular is the Traditional Scottish Breakfast with eggs, bacon, baked beans, haggis, and black pudding. Passengers in higher categories have priority during busy times and their breakfast is included.
Yes, in the Classic Room, adjacent compartments can be connected by a connecting door to form a sort of suite. This is particularly convenient for families with children. Additionally, each part of the train typically includes an accessible sleeper car with wheelchair-friendly compartments.
The Caledonian Sleeper also offers seating cars as the most economical option. Prices start at less than 100 euros, while a sleeper car is significantly more expensive. The seating cars are particularly interesting for budget-conscious travelers and those with bicycles, as bicycle spaces are available here.
Regarding sanitary facilities, all sleeper compartments have at least a washbasin. Club Rooms and Caledonian Doubles go beyond this and feature a private bathroom with toilet and shower. Travelers in Classic Rooms use the shared toilets at the end of the car. The train also includes accessible compartments with adapted sanitary facilities.