You can go almost anywhere in London in jeans and trainers, including the theatre, the opera, every museum and most expensive restaurants. Three kinds of place are the exception: a small number of hotel dining rooms, several places of worship, and a few ceremonial occasions. Where a code exists it is usually published in writing and it is enforced at the door, which is the useful thing to know.
That is the whole answer, and if you pack one shirt with a collar and one pair of shoes that are not trainers, you have covered everything in this article except the temples. What follows is which places, in what words, so you can check before you travel rather than be turned away.
This page is about rules. What to bring for the weather is a different question, and what to pack for London answers it.
The places that genuinely turn people away
In our experience there are only two categories where refusal at the door is a real prospect for a visitor: a Hindu temple or mosque with a published code, and a hotel dining room with a jacket-and-tie rule. Everything else is a matter of feeling underdressed rather than being stopped.
The strictest published code in London belongs to BAPS Shri Swaminarayan Mandir in Neasden, and it is precise rather than vague. Tops must cover the shoulders, the chest, the navel and the upper arms. Leg-wear must reach at least below the knee. It applies to everyone, in every part of the complex, regardless of gender. Shoes come off on entering any part of the Haveli, and only palm-sized purses and wallets may be carried inside. Visitors are turned away every week for getting this wrong.
In practical terms: a short-sleeved shirt is fine, a sleeveless one is not; shorts and short skirts are out for everyone; and leggings under a knee-length garment are what most caught-out visitors end up wearing. Entry is free and the temple is open from 9am to 6pm, so there is no ticket to lose, only a journey to north-west London.
Neasden's bag rule is stricter than its clothing rule. Only a palm-sized purse or wallet goes inside, and cameras are not allowed in the complex at all. A day bag means a trip back to the baggage cabin in the car park, so travel light on the day you go.
Photo: Philafrenzy · CC BY-SA 4.0 · Wikimedia Commons · resized
Cathedrals, churches and services
No London cathedral publishes a numeric dress code, and neither St Paul's nor Westminster Abbey will stop you at the door over what you are wearing. Both are working churches, and the expectation shifts with what you are doing there.
Sightseeing during the week: normal clothes, including shorts in summer. Attending a service: the Abbey's own guidance is to dress respectfully, sit where you are put, stay for the whole service and take no photographs. Sightseeing is Monday to Saturday at both; the Abbey admits no sightseers at all on Sundays, when it is open for worship only.
If you want to be inside one of these buildings at its best, go to a free Evensong rather than buying a sightseeing ticket, and treat it as a service rather than a performance. Our guide to choral evensong in London explains which cathedral sings on which night.
Mosques, synagogues and gurdwaras
Each of these publishes its own rules and they differ, so the honest answer is to check the building rather than to trust a general principle. Two notes from our own attempts to check.
The Islamic Cultural Centre, which runs the London Central Mosque in Regent's Park, does publish a dress code for booked visits, but the section is drawn by script and we could not read it in September 2026. Ask when you arrange a visit. Bevis Marks Synagogue in the City is the oldest synagogue in Britain still in use, and, as at synagogues generally, men are expected to cover their heads inside; head coverings are normally provided.
Across all of them, two habits will keep you out of trouble: bring something with sleeves and something to cover your head, and expect to take your shoes off. Wear socks you are happy to be seen in.
The Ritz, and the last jacket-and-tie rule that means it
One London hotel still enforces a jacket and tie, and it publishes exactly where. At The Ritz on Piccadilly, gentlemen are required to wear a jacket and tie for Afternoon Tea and for lunch and dinner in The Ritz Restaurant, and jeans and sportswear are not permitted for either ladies or gentlemen in those rooms.
The interesting half of that wording is the exemption. In every other part of the hotel, which the code lists as the breakfast service, the Rivoli Bar, the Secret Garden and the Cigar Shop, smart casual is acceptable. Sportswear is not permitted anywhere in the hotel's restaurants or bars. So the jacket is a rule about two rooms, not about the building.
Elsewhere the direction of travel has been one way for twenty years. Our guides to afternoon tea in London, cocktail bars and rooftop bars carry the current position venue by venue, and the pattern is consistent: most say smart casual, several ban sportswear or football shirts, and almost none require a tie. Age limits are now enforced far more often than dress codes are.
What "smart casual" actually means in London
It is a real standard, not a polite nothing, and it is narrower than it sounds. In a London hotel bar or restaurant it means closed shoes rather than trainers or sandals, a collar or a knit rather than a t-shirt with printing on it, and trousers or a dress rather than shorts or gym wear. Jeans are usually accepted; jeans with rips are usually the thing that gets a second look.
What is refused, when anything is refused, is almost always the same short list: sportswear, football shirts, vests, beachwear and anything visibly for the gym. If you own one plain jacket and one pair of dark shoes, you will never be stopped anywhere in London.
Nobody in a London theatre cares what you wear. The West End has no dress code, and on any given night the same auditorium holds suits, jeans and people who have come straight from work. Our West End theatre guide covers what does matter, which is when tickets go on sale.
The ceremonial occasions, and the one we could not verify
The genuinely formal occasions in the British calendar mostly happen outside London, and the strictest of them is Royal Ascot in June, at Ascot in Berkshire. It publishes a detailed dress code, enclosure by enclosure, with different requirements for the Royal Enclosure, the Queen Anne Enclosure, the Village Enclosure and the Windsor Enclosure, and it is enforced at the gate rather than politely suggested.
We are not going to reproduce it, because we could not read it. The racecourse's dress code pages are drawn by script and returned no text to us in September 2026, and we will not publish a code for a place that turns people away on the strength of a code we have not read. Check it on the racecourse's own site before you buy a badge, and note that the requirements for the Royal Enclosure are stricter than for the rest. Our page on horse racing near London covers the meetings that are reachable from the city.
Inside London, the ceremonial events a visitor can attend are mostly outdoors and free, which means the practical dress code is the weather rather than a rule: Trooping the Colour, the Lord Mayor's Show, gun salutes and the Changing of the Guard all involve standing still in the open for an hour or more.
The rules that are about bags, not clothes
Several London buildings have rules that function like a dress code because they change what you can carry, and they catch out anyone arriving with luggage.
- Parliament has airport-style security, and the official advice is to arrive twenty minutes before a tour to get through it. Our page on Houses of Parliament tours has the ticket office location.
- The Churchill War Rooms have no cloakroom at all and do not permit suitcases.
- The Natural History Museum will not allow large or wheeled suitcases into the building, and charges for its cloakroom: £5 for a bag under 4kg, £6 over, £5 for a pushchair.
- Neasden Temple, as above, allows only a palm-sized purse inside.
The general rule is that a wheeled case will be refused somewhere on any day you carry one, so store it before you start sightseeing.
If you have packed wrong
Buying the missing item is easy on six days of the week and awkward on the seventh. Large shops, meaning anything over 280 square metres, may open for only six hours on a Sunday, between 10am and 6pm, and in practice most West End department stores trade from noon. Our page on opening hours and Sunday trading sets out the exceptions.
For a shirt, a jacket or a scarf to cover your shoulders at short notice, Oxford Street is the obvious answer and is open late most weekdays. A scarf is the single most useful thing to carry if your itinerary includes a temple, a mosque or a cathedral service: it solves shoulders, head covering and a cold nave at once.
One last piece of advice that is not about rules at all. The thing that marks out a visitor in London is not clothing but footwear, because Londoners walk further than they expect to and dress their feet accordingly. Our notes on British etiquette cover the behaviour that matters more than any of this.
Frequently asked questions
Is there a dress code for London theatres or the opera?
No. West End theatres publish no dress code and audiences range from suits to jeans and trainers on the same night. The same is true at the opera and at classical concerts, where the only people dressed formally are usually those who have come from somewhere else formal.
Which London restaurant still requires a jacket and tie?
The Ritz, for Afternoon Tea and for lunch and dinner in The Ritz Restaurant. Jeans and sportswear are not permitted for anyone in those rooms. The rest of the hotel, including the Rivoli Bar and the breakfast service, accepts smart casual, and sportswear is barred throughout its restaurants and bars.
What should I wear to visit a temple or mosque in London?
Cover your shoulders and upper arms, cover your legs below the knee, and be ready to take your shoes off. Neasden Temple publishes exactly that requirement and applies it to everyone. Most mosques expect women to cover their heads, and synagogues expect men to. Each building publishes its own rules, so check before you travel.
Can I wear shorts in Westminster Abbey or St Paul's?
For ordinary sightseeing, yes. Neither cathedral publishes a clothing requirement, and neither will refuse you. For a service, the Abbey asks visitors to dress respectfully, which in practice means covered shoulders and nothing you would wear to a beach. Westminster Abbey admits no sightseers on Sundays.
Do London nightclubs and bars have dress codes?
Some do, and they are door policies rather than published codes, which means they are applied at the doorman's discretion. Sportswear, football shirts and trainers are the things most often refused. Smart casual with closed shoes will get you into anywhere in London that is worth getting into.
Sources
- The Ritz London - The Ritz Restaurant, dress code (checked September 2026)
- Legislation.gov.uk - Sunday Trading Act 1994, Schedule 1 (checked September 2026)
- Natural History Museum - Access at South Kensington, cloakroom charges (checked September 2026)
- Imperial War Museums - Churchill War Rooms visitor information (checked September 2026)
- UK Parliament - Guided tour booking and security (checked September 2026)
- Ascot Racecourse - Royal Ascot, what to wear (page could not be read; checked September 2026)
- Islamic Cultural Centre and London Central Mosque (dress code section could not be read; checked September 2026)