In Britain a twin room has two separate single beds, a double has one bed for two people, en suite means the bathroom is inside your room, and a family room has no agreed meaning at all. Those four words cost more sleep than anything else on a booking form: three mean something slightly different from what visitors expect, and the fourth means whatever the hotel says.
Most of this vocabulary is trade convention rather than law, and a hotel can call a room almost anything. The one place the words are pinned down is the national quality scheme: VisitEngland publishes minimum sizes and definitions that any assessed hotel must meet, and those are the nearest thing Britain has to a standard.
This page is about the words and the occupancy arithmetic behind them. What the room physically contains, from the kettle to the shaver socket, is in our guide to what a London hotel room is actually like, which also has the full table of bed widths.
The words, translated
- Single
- One bed for one person. Minimum 190 cm by 90 cm in the national scheme
- Twin
- Two separate single beds in one room, for two people
- Double
- One bed for two people. Minimum 190 cm by 137 cm
- Double or twin
- The hotel will decide, not you, unless you get it confirmed in writing
- En suite
- A bathroom or shower room inside your room, with its own WC
- Family room
- No fixed definition. It may be a double plus a sofa bed, or a double plus bunks
- Suite
- In the scheme, at least three separate rooms with doors: bedroom, bathroom and sitting room
The one set of definitions that is written down
VisitEngland's quality standards for hotel accommodation set minimum entry requirements that every assessed hotel has to meet, whatever its star rating, and they are unusually specific about beds:
- A single bed must be at least 190 cm by 90 cm.
- A double must be at least 190 cm by 137 cm, and a bed 122 cm wide is "to be designated as singles". A four-foot bed cannot be sold as a double.
- Sofa beds are not acceptable as permanent bed spaces.
- Bunk beds as permanent bed spaces are for children's use only, and are not acceptable at all at five stars.
- There must be good access to both sides of a bed used by two people.
- At five stars, beds for two must be at least 153 cm wide and beds for one wider than 90 cm.
- An assessed hotel must have at least five letting bedrooms, all en suite with a WC and a thermostatically controlled shower.
- A suite means at least three separate rooms, each with a door: bedroom, bathroom and sitting room.
Two things follow. Those are minimums rather than typical figures, so a double that just clears the bar is 137 cm wide and two adults will find it narrow for a week. And they bind only hotels that have joined the scheme; a great many London hotels, guest houses and apartment lettings have not.
Ask for the bed width in centimetres, not by name. It is the one question that cuts through every marketing word on the page, it takes a hotel ten seconds to answer, and the answer is checkable when you arrive. If two of you are tall or broad, this matters more than the district, the breakfast or the star rating.
"King" and "queen" are not British sizes, and chains use them anyway
British bed names run single, small double, double, king and super king. American and European names have leaked in, and they do not map across. One large European hotel brand operating in Britain defines its king bed as 180 cm by 200 cm and its queen as 160 cm by 200 cm. A British king is usually about 150 cm, so that chain's queen is wider than most British kings and its king is what Britain would call a super king. If a booking page says queen or king, the word tells you where the brand comes from and nothing reliable about the bed.
Twin or double, and why you may not get the one you booked
A twin is the room to ask for if you are travelling with a friend, a colleague or a parent, and asking for one is entirely unremarkable in Britain.
The complication is that at many hotels the bed configuration is a request rather than a guarantee. The room type sold is "double or twin", the housekeeper makes up whatever the last guest left, and the hotel reserves the right to allocate. If the difference matters, do three things: choose a rate that names the bed type, put the request in writing when you book, and mention it again at check-in before you go upstairs. A hotel that has not yet released the room can usually fix it in five minutes.
Where a hotel genuinely cannot, ask what it will do instead, at the desk rather than by email a week later. The position on rates and remedies is in our guide to booking a hotel you can cancel.
What "sleeps four" actually means
A room advertised as sleeping four in London is very rarely four proper beds. Read the description for the words below and count the permanent beds, not the headline number.
| What the listing says | What it usually is | What to check |
|---|---|---|
| Sleeps 3, extra bed | A double plus a folding single wheeled in, which fills the floor | Whether the third bed is charged separately, and whether a suitcase will still open |
| Sleeps 4, sofa bed | A double plus a sofa that converts. Comfortable for children, rarely for adults | The scheme says a sofa bed is not an acceptable permanent bed space, so treat it as an extra rather than a bed |
| Sleeps 4, bunk beds | A double plus two bunks, common in budget and family brands | Bunks are for children's use in the scheme, so two adults should not plan on them |
| Zip-and-link | Two singles that lock together into one wide bed, or split into a twin | Whether they will be zipped or split on arrival, and whether there is a join down the middle |
| Interconnecting rooms | Two rooms with a shared door, sold as one booking | That the door exists, rather than two rooms on the same corridor |
| Maximum occupancy 2 | A hard limit, usually set by the fire risk assessment | Nothing. It is not negotiable, and a third person will be refused |
Cots are usually free for a baby but must be requested in advance, because hotels hold only a few. A child in a cot does not normally count against maximum occupancy; a child in a bed does. Our guide to family rooms and rooms for three has the London arithmetic.
"Family room" is the one word with no meaning at all
There is no British definition, and the national standards say only that "rooms for family occupation need to be significantly larger" than the minimum. In practice the phrase covers a double with a sofa bed, a double with bunks, three single beds, two interconnecting rooms, and occasionally a large double with nothing extra in it at all.
So never book on the words. Ask how many permanent beds there are, of what width, and what the maximum occupancy is, and ask the floor area in square metres if the party is four or more.
En suite, private and shared
The distinction is simple: en suite means the bathroom is inside your room; a private bathroom is yours alone but may be across the landing; shared means shared. Every bedroom in an assessed hotel must be en suite, so the question arises mainly in guest houses, where our guide to London B&Bs and guest houses untangles all three.
Two related phrases: "wash basin in room" means exactly that and nothing more, and at the compact-room and hostel end of the market a shower and a WC are sometimes in separate cubicles rather than one bathroom. Our guides to pod and compact-room hotels and London hostels cover those layouts.
The rate words: room only, B&B, half board
The second vocabulary on a booking page is about what the money buys, and British usage is fairly consistent here.
- Room only. The bed and nothing else. The London default in chain hotels.
- Bed and breakfast, or B&B rate. Breakfast included. Ask which breakfast: a continental buffet of bread, cereal and fruit is a different proposition from a cooked breakfast, and our page on the full English breakfast explains what the cooked version contains.
- Half board. Breakfast and one other meal, normally dinner. Rare in London, common at country hotels.
- Full board. All three meals. Very rare in a city.
- Per room per night is the normal British basis. Per person appears at guest houses and on package rates, and doubles the number you first read.
- Single occupancy, or double for sole use. One person in a double room, priced much closer to the double rate than to half of it. The gap is the single supplement, and it is why solo travel in Britain costs more per head.
Rates named standard, classic, superior, executive and deluxe describe one hotel's own ladder and mean nothing between hotels. Our guides to British hotel chains and budget hotels in London explain what each tier delivers.
What the law requires the price to show
Accommodation prices in England, Scotland and Wales are governed by Part 4, Chapter 1 of the Digital Markets, Competition and Consumers Act 2024 and by the Provision of Services Regulations 2009. Guidance sets out what that means: price information must be available before you decide to book, must not be misleading, and must include VAT and any mandatory service charge. A charge you cannot avoid is mandatory, and it belongs in the headline price.
The same guidance says a price list should show the price of a room for one person and for two, whether breakfast is included, and any surcharge for single occupancy of a double. The national quality standards add a blunt line of their own: the price agreed at the time of booking must not be exceeded. The charges that legitimately sit outside the room rate are in our guide to hotel extras and hidden costs.
Accessible rooms, and the words used for them
"Accessible" and "adapted" are used loosely, and the details matter more than the label: door width, whether the shower is a level-floor wet room or a bath with a rail, whether there is a hoist, and how far the room is from a lift. In a converted London townhouse an accessible room on the first floor may still involve a step. Our guide to accessible hotels in London has the questions to ask.
Put these five things in writing
- The bed type, and its width in centimetres.
- The number of permanent beds and the maximum occupancy.
- Whether the bathroom is en suite, and whether it has a bath, a shower over a bath, or a separate shower.
- Whether breakfast is included, and which breakfast.
- The floor the room is on, and whether the building has a lift.
All five are free to ask and none can be fixed once the hotel is full. Two other British usages: the ground floor is the one at street level, so a first-floor room is one flight up, and "compact" in a room description is an honest warning. More of that vocabulary is in our page on British words and slang for visitors.
Two categories sidestep the whole vocabulary. A serviced apartment is sold by the number of bedrooms rather than by bed name, and our guide to aparthotels and serviced apartments explains the pricing. University halls in the summer are almost all single rooms with a single bed, a real constraint that our guide to university rooms in the summer holidays takes seriously; Bloomsbury has more of them than anywhere else in London.
Frequently asked questions
What is a twin room in Britain?
A room with two separate single beds, each normally at least 190 cm by 90 cm, for two people. It is the standard choice for friends, colleagues or relatives sharing, and asking for one is completely ordinary. It is not the same as a double, which has one bed for two people.
How wide is a British double bed?
The national quality standards set the minimum for a double at 190 cm by 137 cm, and 137 cm is what many London hotels provide. A bed 122 cm wide must be described as a single. A British king is usually about 150 cm, and at five stars a bed for two people must be at least 153 cm wide.
Does en suite always mean a bathroom in my room?
Yes, that is what the term means, and every bedroom in a hotel assessed by VisitEngland must have one with a WC and a thermostatically controlled shower. The confusion arises in guest houses, where "private bathroom" can mean a bathroom reserved for you but reached across a landing, and "shared" means shared.
What is a family room in a British hotel?
Whatever the hotel decides. There is no national definition, and the standards say only that rooms for family occupation must be significantly larger. Ask how many permanent beds there are, how wide they are, what the maximum occupancy is, and the floor area, before you compare two family rooms on price.
Can four adults share a room that sleeps four?
Often not comfortably, and sometimes not at all. A London room sold as sleeping four is usually a double plus a sofa bed or bunks, and the quality standards treat sofa beds as unsuitable for permanent use and bunks as suitable for children. Count the proper beds rather than the advertised capacity.
Why does one person in a double room cost nearly as much as two?
Because British hotels price the room rather than the head, and the room costs the same to service either way. The difference between the single-occupancy price and half the double price is the single supplement. It is legal and normal, but it must be disclosed: guidance says any surcharge for single occupancy of a double room should appear in the price information.
Sources
- VisitEngland Assessment Services - Quality standards for hotel accommodation (checked September 2026)
- National Bed Federation - Regulations and standards for beds and mattresses (checked September 2026)
- Business Companion (Chartered Trading Standards Institute) - Displaying prices in hotels (checked September 2026)
- Digital Markets, Competition and Consumers Act 2024, Part 4, Chapter 1 (checked September 2026)
- The Provision of Services Regulations 2009 (checked September 2026)
- VisitEngland - Quality schemes for accommodation (checked September 2026)