Petrols must comply with Euro 4, which became mandatory in January 2006, while diesels must comply with Euro 6, which became mandatory in September 2015. If you drive a non-compliant car into the ULEZ, you must pay a £12.50 daily fee or face a £120 fine, although there are exemptions, including for disabled people, small businesses, charities and historic vehicles (those over 40 years old).

Thankfully, there are plenty of appealing options if you want to avoid the charge. Let's take a look at the grest used cars that pass the ULEZ - and also some cars that don't and as a result can be great bargains if London's ULEZ doesn't impact you - Read on: