Brexit is one of the biggest political issues in the UK at the moment, with something called 'no-deal Brexit' making a lot of headlines.
Politicians have spent almost all of their time trying to sort out what will happen with Brexit since Parliament returned after its summer break, as the deadline for the UK leaving the European Union (EU) is currently set for 31 October 2019 - just over six weeks' time.
At the moment, it hasn't been decided exactly how the UK will leave the EU and what its relationship with this club of countries will be like once it has left the group.
No-deal Brexit is one of the outcomes being discussed a lot at the moment.
Prime Minister Boris Johnson has said that it should be an option, but lots of MPs don't think the country should leave in that way and they have been working to create laws to stop it from happening at all.
But what does 'no-deal Brexit' actually mean?
A no-deal Brexit means the UK would leave the European Union (EU) and there would be no agreements in place about what the relationship between the UK and the EU will be like in future.
This includes special agreements about how UK and EU companies could work and trade with each other.
If a special deal between EU leaders and UK politicians isn't agreed, then the UK could leave the EU with no deal in place. This would be a no-deal Brexit.
It's believed a no-deal Brexit could lead to a number of things happening. For example:
- Some border checks could be re-introduced
- Transport and trade between the UK and the EU could be severely affected
- Adults may not be able to drive in EU countries without a special driving licence
- It could cost more money to use your phone abroad in EU countries
- It would mean no transition period, which was part of the deal that the former Prime Minister Theresa May was proposing, which was rejected by MPs
In November last year, Mrs May refused to rule out a no-deal Brexit if Parliament voted against her deal, but Labour leader Jeremy Corbyn told ITV that "nobody is going to allow no-deal".
The government's Brexit secretary Stephen Barclay said the cabinet had agreed that "preparing for a no-deal will be an operational priority within government, but our overall priority is to secure a deal".
Mr Johnson has said that he would like to have a deal but that he is willing to take the UK out of the EU without a deal on 31 October, if a suitable one cannot be agreed.
But in September MPs passed a law that would force the prime minister to ask the EU for an extension to the 31 October deadline if a deal was not agreed by 19 October.
If this happens, all 27 countries which are part of the EU club must agree to the extension. If they do not ALL agree, the UK will leave without a deal.
A lot of companies have said they are worried about not knowing exactly how their businesses will work if there is a no-deal Brexit at the end of October.
For example, food companies have asked the government to allow them to be able to make special agreements with companies in EU countries if a no-deal Brexit happens. But as things stand at the moment, they wouldn't be allowed to do this.
A lot of people in Parliament don't want a no-deal Brexit to happen, but it's a possible outcome if politicians can't agree on what should happen next, or if the EU and the UK can't agree on what their relationship should be like.
But others think that a no-deal Brexit would give the UK the freedom it wants from the EU - one of the reasons that many people voted for Brexit in the first place.
Many say that those against no-deal Brexit are exaggerating problems that could happen as a result of it, and that a no-deal Brexit isn't as bad as some people are making out that it would be.
Boris Johnson has said he is "cautiously" optimistic about sorting out how Brexit will happen, ahead of meeting EU leaders this week.
At the start of August, the government announced an extra £2.1 billion of funding to prepare for a no-deal Brexit, which is doubling the amount of money set aside this year.
"With 92 days until the UK leaves the European Union, it's vital that we intensify our planning to ensure we are ready," explained Chancellor Sajid Javid at the time.
"If we can't get a good deal, we'll have to leave without one," he added. "This additional £2.1 billion will ensure we are ready to leave on 31 October - deal or no-deal."
The money would be spent on:
- More security officers at the UK border
- Improvements to ports to deal with any transport issues
- Dealing with traffic problems in Kent (home to the Port of Dover, which deals with around 10,500 lorries a day coming in and out of the UK)
- Tackling delays at the UK border (for example, at the Channel Tunnel which deals with around 6,000 lorries every day)
- Ensuring that there is enough of the medicines in the UK which need to be brought in from EU countries
- A plan to help businesses which may need to adjust as a result of no-deal Brexit
Former Border Force director-general Tony Smith said the extra money that was announced by the government was a "step in the right direction", but he thinks that more should have been done earlier to prepare for this possible outcome.
"I don't understand why this wasn't implemented three years ago when the government knew we were leaving the European Union," he said.
Shadow chancellor John McDonnell - who is an important member of the government's rival party, the Labour Party - described the plans as "an appalling waste of taxpayers' cash".
Last week, MPs passed a law that would force the prime minister to ask the EU for an extension to the 31 October deadline if a deal was not agreed by 19 October.
But there are still a lot of question marks over what the UK's relationship will be like with EU countries in the future - not least because Mr Johnson has repeatedly said that he is not willing to delay Brexit beyond the 31 October deadline.