For UK drivers, the cities with the strictest vehicle emission rules are London, Birmingham, Bristol and the four Scottish cities with low emission zones (Glasgow, Edinburgh, Aberdeen and Dundee). Across the Channel, Brussels, Milan and Paris set tougher limits than London, banning diesel cars that would still drive through the ULEZ for £12.50 a day. Rules abroad have changed several times since 2025, so treat what follows as a guide to where the strict zones are and check the official site for each city before you travel.
Which cities have the strictest vehicle emission rules?
In London and the English Clean Air Zones you can still drive an older car in if you pay a daily charge. In Scotland, Brussels, Milan and Paris a non-compliant car is banned, and entering brings a penalty. As of 31 Oct 2026, this is how the zones compare for private cars:
- Milan's Area B bans petrol cars up to Euro 3 and diesel cars up to Euro 5 on weekdays.
- Brussels requires Euro 6 for diesel and Euro 3 for petrol, every day of the year.
- Greater Paris restricts Crit'Air 3, 4 and 5 cars on weekdays, which catches petrol cars registered before 2006 and diesels registered before 2011.
- London, Birmingham, Bristol and Scotland's four cities use the same standard: Euro 4 for petrol and Euro 6 for diesel.
- Oxford's small city-centre Zero Emission Zone charges every petrol, diesel and hybrid car in the daytime.
Euro 4 petrol cars were generally sold from 2006 and Euro 6 diesels from September 2015, but the exact standard matters more than the year. Our guide on how to check if a car is ULEZ, LEZ or CAZ compliant explains how to confirm it.
London's ULEZ
The Ultra Low Emission Zone covers all London boroughs (the M25 itself is outside it) and runs 24 hours a day, every day except Christmas Day. Cars that don't meet Euro 4 for petrol or Euro 6 for diesel pay £12.50 a day, according to Transport for London. If you don't pay, TfL's current fact sheet puts the penalty charge notice at £180, reduced to £90 if you pay within 14 days.
London's standards are no tougher than Birmingham's, but the zone is far bigger, and TfL's figures show around 98% of cars seen in it in late 2025 met the standard. A non-compliant car driven in every day would cost around £4,550 a year. Our complete guide to ULEZ covers exemptions.
Clean Air Zones in England that charge cars
England has 7 Clean Air Zones listed on GOV.UK: Bath, Birmingham, Bradford, Bristol, Portsmouth, Sheffield and Tyneside (Newcastle and Gateshead). Only 2 of them, Birmingham and Bristol, are Class D zones that charge private cars. The others only charge buses, taxis, vans or lorries, depending on their class. Greater Manchester was removed from the list in February 2025 after the government agreed to a plan without charges.
The standard for cars is the same as London's: Euro 4 petrol, Euro 6 diesel.
- Birmingham charges £8 a day for non-compliant cars, vans and taxis.
- Bristol charges £9 a day for private petrol and diesel cars that don't meet the standard.
You can pay up to 6 days before you travel and until 11:59pm on the sixth day after you drive in. In Birmingham the penalty for not paying is £120, reduced to £60 if paid within 14 days. If you've already missed a payment, see what happens if you forget to pay a ULEZ or CAZ charge.
Oxford's Zero Emission Zone
Oxford has run a small pilot Zero Emission Zone in the city centre since 28 Feb 2022. Petrol and diesel vehicles, hybrids included, pay a daily charge to drive in it between 7am and 7pm, and only zero-emission vehicles go free. Oxfordshire County Council has proposed a much wider zone, but no start date had been confirmed when we checked.
Scotland's low emission zones
Glasgow, Dundee, Edinburgh and Aberdeen run low emission zones that you can't pay to enter. Glasgow's started enforcement for most vehicles on 1 Jun 2023, Dundee's on 30 May 2024, and Edinburgh's and Aberdeen's on 1 Jun 2024. All 4 operate around the clock.
The car standards match England's. If you drive in with a non-compliant car, Transport Scotland sets the first penalty at £60. It doubles with each further offence, up to £480 for cars, and goes back to £60 if you aren't caught again within 90 days. Paying within 14 days halves it.
Paris and the French Crit'Air system
France uses a coloured windscreen sticker called Crit'Air to sort vehicles into 6 classes, from green (electric and hydrogen) down to class 5. Cities with a zone à faibles émissions (ZFE) decide which classes they let in. The rule that catches out UK visitors is that any car driving in a ZFE needs a sticker, even a brand-new petrol car that easily meets the standard.
The Greater Paris zone covers 77 communes inside the A86 ring road (the A86 itself is excluded). Since 1 Jan 2025, cars in Crit'Air classes 3, 4 and 5, plus unclassified cars, have been restricted Monday to Friday, 8am to 8pm, except public holidays. According to the official Service-Public guide, Crit'Air 3 covers petrol cars first registered from 1997 to 2005 (Euro 2 and 3) and diesel cars from 2006 to 2010 (Euro 4). A 2012 diesel would be Crit'Air 2 and allowed in, and a 2015 petrol car would be Crit'Air 1.
The standard fixed fine for driving in a ZFE with a banned car, or without a sticker, is €68, and it can go up to €450. In practice, the Métropole du Grand Paris has kept the zone in an "educational" phase. French motoring press reported in December 2025 that fines for banned vehicles would not start before 1 Jan 2027 at the earliest. The Métropole's own guidance warns that not displaying a sticker can be penalised even during the educational period, so don't drive in without one.
What happened to the vote to scrap ZFEs
In 2025, MPs in the Assemblée nationale added amendments to a wider "simplification" bill to abolish ZFEs across France. The measure was confirmed in the final Assemblée vote on 14 Apr 2026. On 21 May 2026 the Conseil constitutionnel struck it out, ruling it was a legislative rider with too little connection to the rest of the bill. The ZFEs therefore stayed in law.
A new bill to abolish them was tabled in June 2026. The Assemblée's sustainable development committee rejected it by 21 votes to 19 on 30 Sep 2026, and the debate in the full chamber on 8 Oct 2026 ran out of time before any vote. As of late October 2026 the ZFEs still apply, but the rules for 2027 could change again.
How UK drivers get a Crit'Air sticker
Order it only from the official French government site, certificat-air.gouv.fr. Other websites resell the same sticker at a mark-up. The official fee for a vehicle registered abroad is €5.11 including postage, and delivery takes about 10 working days, so order it at least 2 to 3 weeks before you go. You'll be asked for details from your V5C, and the sticker is posted to the address on it. Each car only needs one sticker, and it doesn't need renewing.
Other French cities set their own ZFE rules, and temporary restrictions can apply during pollution episodes, with the same €68 fine.
Brussels
The Brussels low emission zone covers the whole Brussels-Capital Region, 24 hours a day, and applies to cars registered in Belgium and abroad. Since 1 Jan 2026, diesel cars need Euro 6 and petrol cars need Euro 3.
That tightening was due in 2025. The Brussels Parliament voted to delay it to 2027, but the Belgian Constitutional Court suspended and then annulled the delay, saying it weakened the right to health. The regional government then allowed a grace period. According to the official Brussels LEZ site, a first offence in 2026 brought a warning letter, and from 1 Jul 2026 a €350 fine can be issued that covers a 12-month period.
UK-registered cars have to be registered for the Brussels LEZ, even if they meet the standard. Registration is free, lasts 5 years, and must be done before you enter or within 5 days of entering. If your car doesn't comply, you can buy a €35 day pass, up to 24 a year per vehicle.
Milan's Area B and Area C
Milan has the strictest rules of any big European city that UK drivers commonly visit. Area B covers around 72% of the city and is enforced by cameras Monday to Friday, 7:30am to 7:30pm. Petrol cars from Euro 0 to Euro 3 and diesel cars from Euro 0 to Euro 5 are banned during those hours. The petrol Euro 3 ban started on 1 Oct 2025. The fine reported by Italian motoring press is €83 per entry, plus notification costs.
Area C is the smaller paid zone in the city centre. You need to buy and activate a ticket to drive in.
Under the current timetable, Euro 4 petrol and early Euro 6 diesel cars (classes A, B and C) are due to be banned from 1 Oct 2028, and later Euro 6 diesels from 1 Oct 2030. Milan has pushed the Euro 6 diesel date back once already, so check the Comune di Milano website before you go, including how it treats foreign-registered cars.
Amsterdam and other Dutch cities
Dutch zones only target diesel cars. Petrol cars can drive in freely and no sticker is needed. Amsterdam and Utrecht turn away diesel cars of emission class 4 or lower, so a diesel needs Euro 5 or newer. Den Haag and Arnhem turn away class 3 or lower, so Euro 4 diesels are allowed. Rotterdam no longer restricts private cars.
German Umweltzonen
Germany has 37 environmental zones, according to the Umweltbundesamt (the federal environment agency), after several cities lifted theirs. In every one of them, only vehicles with a green Umweltplakette sticker may enter, and that includes UK-registered cars. The fine for driving in without one is €80.
Order the sticker from an authorised German issuer well before you travel.
Stockholm and Gothenburg
You may read that Stockholm bans petrol, diesel and plug-in hybrid cars from its centre. The city did decide on a small "class 3" zone open only to electric, fuel cell and gas cars, but the Stockholm County Administrative Board overturned that decision on 26 May 2025, finding the city had not investigated its effects properly. The zone never came into force.
Stockholm does apply a "class 2" zone on Hornsgatan, where, under Transportstyrelsen's rules, petrol cars must meet Euro 5 or 6 and diesel cars Euro 6. Gothenburg appears on Transportstyrelsen's list as a class 1 zone, which only applies to heavy vehicles.
Before you drive abroad
- Confirm your car's exact Euro standard, using the manufacturer if the registration date leaves any doubt.
- Order any sticker (Crit'Air, Umweltplakette) from the official issuer at least 2 to 3 weeks before travel.
- Register for Brussels if you'll drive into the city, even if your car complies.
- Check each city's official site the week you travel, because dates in Paris, Brussels and Milan have moved more than once since 2024.
If you're buying a used car you'll drive into a zone, a free car check on CheckVehicle shows its DVLA data and MOT history, including fuel type and first registration date, so you can work out its likely Euro standard before viewing.
Frequently asked questions
Do UK cars need a Crit'Air sticker in France?
Yes, if you drive into a French low emission zone (ZFE) or an area under pollution-episode restrictions. Order it only from certificat-air.gouv.fr, where it costs €5.11 for a foreign-registered car including postage.
Has France abolished its low emission zones?
No. Parliament voted to scrap them in April 2026, but the Conseil constitutionnel struck that measure out on 21 May 2026. A second bill was rejected in committee in September 2026 and hadn't reached a vote in the full Assemblée by the end of October.
Is a Euro 5 diesel allowed in Brussels?
No. Since 1 Jan 2026, diesel cars need Euro 6 to drive in the Brussels LEZ. You can buy a €35 day pass up to 24 times a year, and fines of €350 can be issued from 1 Jul 2026.
Which UK cities charge private cars for emissions?
London (ULEZ, £12.50 a day), Birmingham (£8) and Bristol (£9) charge non-compliant cars. Oxford's pilot zone charges all non-zero-emission cars in the daytime. Glasgow, Edinburgh, Aberdeen and Dundee don't charge: they ban non-compliant cars and issue penalties starting at £60.
Do I pay ULEZ and the Clean Air Zone charges on the same day?
Only if you drive in both zones that day. Each zone is charged separately, and London's Congestion Charge is also separate from ULEZ, as our ULEZ vs Congestion Charge guide explains.
