Brexit: All you need to know about the UK leaving the EU

Brexit happened when the UK left the European Union on 31 January 2020.

If it feels like little has changed, that's because both sides agreed many things would stay the same for 11 months, to allow leaders time to agree a deal for life after Brexit.

Time runs out on 31 December but things are far from settled.

The EU and the UK always had to agree new rules for how to live, work and trade together.

While the UK was in the EU, companies could buy and sell goods across EU borders without paying taxes (known as tariffs). If there is no trade deal, businesses will have to start paying these taxes, which could make things more expensive.

As well as a deal on goods the UK would like one on services, which are a big part of its economy. This isn't part of the talks, but separate agreements on things like banking are still possible.

Agreements on areas like airline safety, medicine and the sharing of information about security threats are also important.

A deadline of 15 October set by UK Prime Minister Boris Johnson is long gone. The UK and EU have been talking, but with a few weeks to go, the two sides say the conditions for a deal are still "not there".

The three main sticking points are:

The EU also fears the UK is trying to change an agreement made about the complicated case of Northern Ireland - the only part of the UK to have a land border with the EU.

There is a lot of trade between the EU and the UK, which won't change overnight.

If there is no trade deal, it could mean higher prices in UK shops. There could also be delays as lorries bringing products in would need even more border checks.

Brexit supporters say leaving the EU will give the UK more freedom to strike trade deals around the world.

When the UK was in the EU, it was automatically part of EU trade deals with more than 70 countries.

Since leaving, it has made deals with more than 50 of those countries, in order to continue trading in the same way. It is unlikely the UK will manage to do deals with all of the others before the end of the year.

It is also in talks with countries such as the US and Australia with which the EU does not have free trade deals, but none of these trade deals has yet been reached.

"Significant differences" remain with the deadline of 31 December fast approaching, and UK Prime Minister Boris Johnson will now travel to Brussels to see whether a deal can be done.

Deal or no deal, the way people live and work will be different.

The last few years has seen many words and phrases enter our lives. We haven't used them here, but politicians do use them. Here's what some of them mean:

Transition period: The 11-month period following the UK's exit from the EU (finishing at the end of 2020), during which time the UK follows EU rules and leaders try to make a deal

Free trade agreement: This is what the EU and the UK are trying to agree - a deal between countries that encourages trade by getting rid of barriers like taxes on goods

WTO rules: If countries don't have free trade agreements, they must trade according to rules set by a global body called the World Trade Organization (WTO), which generally involve tariffs, which are taxes on goods brought into a country