United Kingdom

UK drugs are graded Class A, B or C. Simple possession maxes out at 7 years for Class A, 5 years for Class B and 2 years for Class C — supplying a Class A drug can mean life in prison.

Possession: Class A up to 7 years, Class B up to 5 years, Class C up to 2 years — each with an unlimited fine, or both. Supply or production: Class A up to life in prison; Class B and Class C up to 14 years.

Nitrous oxide — laughing gas, sold openly as whippits in parts of the US — is a Class C controlled drug in the UK.

Class C possession: up to 2 years in prison, an unlimited fine, or both. Supply or production: up to 14 years, an unlimited fine, or both.

Cannabis is illegal in the UK as a Class B drug, including types legal in some US states.

Possession can mean up to 5 years in prison; police can also issue an on-the-spot fine of up to £90.

Some medications approved in the US are controlled substances in the UK and need a licence to bring in; carry them in original labelled packaging with a copy of your prescription.

Mailed prescriptions may be blocked by customs, and controlled drugs without authorisation can lead to seizure or prosecution.

It is illegal to carry most knives in public without good reason, including any lock knife or any folding blade over 3 inches; banned knives (flick, butterfly, zombie) cannot even be brought into the UK.

Carrying a knife illegally can mean up to 4 years in prison and an unlimited fine.

You must declare cash of £10,000 or more (or equivalent) when carrying it between Great Britain and any country outside the UK.

Undeclared cash can be seized and you may face a penalty of up to £5,000 to get it back.

Beyond alcohol and tobacco you can bring other goods worth up to £390 into Great Britain duty-free — only £270 if you arrive by private plane or boat.

Go over and you pay customs duty and import VAT on the TOTAL value of the goods, not just the amount above £390. Goods — and any vehicle used to carry them — may be seized, and you may also be fined or prosecuted.

The US State Department warns you WILL be arrested for bringing pocket knives, blades, mace, pepper spray, tasers, or a gun or gun parts into the UK. Self-defence items that are legal in most US states are barred at the UK border.

Arrest at the border. The State Department's advice is to start packing with an empty bag so no prohibited item travels with you by accident.

You must be 18 to buy alcohol in the UK. If you are 16 or 17 you can drink beer, wine or cider with a meal in a pub or restaurant, but only with an adult — and you still cannot buy it yourself.

Under-18s can be stopped, fined or arrested by police for drinking alcohol in public. It is also an offence for an adult to buy alcohol for someone under 18.

Into Great Britain you can bring 42 litres of beer and 18 litres of still wine duty-free, plus EITHER 4 litres of spirits over 22% OR 9 litres of drinks up to 22% (sparkling wine, port, sherry, cider).

Go over an allowance and you pay tax and duty on ALL the goods in that category, not just the excess — 19 litres of wine means duty on all 19. Undeclared goods can be seized.

Being drunk on a flight to or from the UK is strictly enforced — US officials warn it can lead to arrest and prison time.

Arrest and prison time, per the US State Department UK page.

You cannot buy a disposable (single-use) vape anywhere in the UK — sale and supply have been banned since 1 June 2025. Only rechargeable, refillable vapes are sold.

The ban targets businesses, not travellers: retailers face a £200 fine and seizure of stock in the first instance, then an unlimited fine and up to 2 years in prison. Practical effect for a visitor — plan on bringing a rechargeable device or buying one there.

Smoking is banned in every enclosed workplace, public building and on public transport across the UK. There are no indoor smoking rooms — smokers go outside.

GOV.UK publishes a fine of up to £200 for smoking in the workplace (up to £50 in Scotland). Premises that fail to stop people smoking can be fined up to £2,500.

Duty-free tobacco into Great Britain is ONE of: 200 cigarettes, 100 cigarillos, 50 cigars, 250g of tobacco, or 200 heated-tobacco sticks. You can split it — 100 cigarettes plus 25 cigars, for example.

Exceeding the allowance means tax and duty on everything in the tobacco category, not just the excess — 200 cigarettes plus 50 cigars means duty on both. Under-17s get no tobacco allowance at all and must declare any tobacco before arriving.

Traffic in the UK drives on the LEFT side of the road, the opposite of the US.

Confirm your driver's licence is valid in the UK before driving; if you commit a driving offence with no UK address you can be detained.

The drink-drive limit is 80mg of alcohol per 100ml of blood in England, Wales and Northern Ireland, but lower at 50mg per 100ml in Scotland.

Driving over the limit can mean an unlimited fine, a driving ban and up to 6 months in prison.

Flying a drone in the UK needs CAA registration: a Flyer ID for anything 100g or heavier, plus an Operator ID if it is 250g or more OR has a camera. Most travel drones need both.

There are no legal restrictions on same-sex relationships in the UK, or on organizing gay and lesbian events.

UK police can stop and question you at any time, and can search you depending on the situation. You do not have to stop or answer — and refusing on its own is not a reason to search or arrest you.