Why the big supermarket shuts at 4pm on a Sunday

You go to the big supermarket at five on a Sunday and the shutters are down. The small one next door, same brand, is open until eleven.

This confuses people constantly, and it is not the shop being difficult. It is law, it applies across England and Wales, and no amount of checking Google Maps will change it.

Once you know the rule, Sunday stops being a mystery.

The rule, in one line

Large shops may open for six continuous hours on a Sunday, starting no earlier than 10am and finishing no later than 6pm.

That is the Sunday Trading Act 1994, and it is why so many big stores run 10am–4pm or 11am–5pm. Six hours, somewhere inside that window, and the shop chooses which six.

What counts as “large”

A large shop is one with an internal sales area over 280 square metres.

Under that, the shop is small, and small shops face no Sunday restrictions at all — they can open whenever they like.

This single threshold explains almost every confusing Sunday in Britain:

• The superstore on the retail park is large. Six hours.
• The small high-street version of the same chain is under the threshold. Open all day.
• A corner shop is small. Open all day.
• A big DIY warehouse is large. Six hours.

Same brand, same logo, different rules — because the law looks at floor area, not at the name over the door.

The exemptions — shops that ignore the six-hour rule entirely

Some categories are exempt regardless of size. This is the part that explains the other half of Sunday, and the list is more useful than it looks:

• Registered pharmacies, when open solely for medicines and medical or surgical appliances
• Shops whose main trade is alcohol — off-licences
• Motor and cycle supplies and accessories
• Farm shops selling mainly their own produce
• Shops at designated airports and railway stations, and at motorway and other service areas
• Shops occupied by people observing the Jewish Sabbath, who have notified the local authority that they close on Saturday instead

Look at that list again and a pattern appears. Stations, airports and service areas are exempt. That is why the shops inside a big London terminal are open on a Sunday evening when the supermarket down the road is shut.

If you need something on a Sunday afternoon in London, a large railway station is often the best answer available.

The two days almost everything closes

Easter Sunday. Large shops must stay closed. Not six hours — closed.

Christmas Day. Large shops must close. And if Christmas Day falls on a Sunday, the six-hour rule does not rescue them either.

Christmas Day is the single quietest day of the British year. Much of the transport network reduces or stops entirely, and the usual advice about “check before you travel” becomes “assume it is shut and be pleasantly surprised”.

What this means for a 24-hour supermarket

Some large supermarkets do run 24 hours on weekdays. They still cannot open for more than six hours on a Sunday.

So the practical pattern is:

• Monday to Saturday: a 24-hour store is genuinely 24 hours.
• Saturday night into Sunday morning: it closes at midnight, because Sunday has begun.
• Sunday: six hours, somewhere between 10am and 6pm.
• Sunday evening into Monday: many reopen late on Sunday evening for stocking, and some let customers in from around midnight.

That is why a 3am shop on a Wednesday works and a 3am shop on a Sunday does not. Our what is open right now page factors this in.

Where to go instead, on a Sunday night

• Petrol station forecourts. Small, so unrestricted, and frequently 24 hours. The most dependable overnight shop in London.
• Convenience-format stores. Under 280 m², open all day.
• Large railway stations. Exempt, and central.
• Corner shops. Open when everything else is not.

Full picture in what is actually open 24 hours in London and the verified 24-hour list.

Scotland is different

Sunday trading restrictions of this kind apply in England and Wales. Scotland has no equivalent restriction, which is why a Scottish superstore can trade normally on a Sunday.

Worth knowing if you are used to one and find yourself in the other.

The one-line version

Over 280 square metres: six hours, between 10am and 6pm. Under it: open as they like. Stations, airports, pharmacies and off-licences are exempt. Easter Sunday and Christmas Day, the big ones close entirely.

Sources

• House of Commons Library — shop opening hours and Sunday trading
• Association of Convenience Stores — trading hours

Checked 27 August 2026. General information for England and Wales. Individual shops set their own hours within the law — always check the specific branch.