- and which version authorities require.
SHOPPING Will my basket go up in price?
It's a possibility that the cost of food will be affected by Brexit - even now a deal has been agreed.
The UK and the EU will continue to trade without having to pay tariffs on goods imported and exported between the two blocs from January 1, in a Canada-style deal.
And Boris Johnson says that's a great thing for Brit food businesses.
The PM said: "If anything, a deal will allow exporters to do even more business with our EU friends."
Supermarkets had warned of supply problems without a deal Credit: Huw Evans Picture Agency It's understood the coast of a trolley of shopping could potentially rise Credit: London News Pictures However, what we might see are some shortages, especially at the beginning.
An overview published by the European Commission suggested the EU would immediately implement tough new checks on food products.
There'll be no grace period, so that will start right away.
Leaders in British food and farming have warned that this, plus the chaos in Dover and last-minute nature of the deal, is likely to result in some price rises.
SECURITY When quizzed by The Sun, the PM said he was "absolutely confident" the deal "protects our police co-operation, protects our ability to catch criminals and to share intelligence across the European continent in the way that we have done for many years".
He added: "I don't think people should have fears on that score, or indeed on any score."
He said the deal would prioritise the "safety and security of its citizens" - and claimed it offers "streamlined co-operation" on law enforcement to bring criminals to justice.
Boris has reassured Brits that the deal will keep them safe Credit: Getty Images - Getty Brexit documents released today reveal the UK and EU will work together on security "when itn their mutual interest".
Either side will be expected to share best practices and continue to cooperate, officials say.
FINANCES Will my home cost more?
Experts have been divided for some time now on what Brexit means for the market.
But it's generally agreed that prices will fall in 2021 regardless of whether the UK left with a trade deal in place.
Over the summer, the housing market has experienced a mini-boom thanks to a stamp duty break, which is due to end on March 31.
The Office for Budget Responsibility (OBR) predicted last month that house prices will fall by 8.5% by the end of next year.
House prices hit their highest level ever in October according to Halifax What does it mean for the pound?
The pound rose ahead of a deal being secured - and it's generally accepted that the pound will be stronger with the agreement in place.
The Bank of England (BoE) warned last week that "sterling would retreat" if the UK left without a deal.
It's worth remembering though that it's still 10 per cent down compared to what it was on the day of the EU referendum 2016.
The pound slumped by 15 per cent following the results which saw Brits vote to leave the bloc, trading at a 30-year low against the US dollar and other currencies.
The Bank of England had warned of surging inflation without a deal Credit: Getty - Contributor It had been feared the pound would grow weaker in the event of a No Deal Brexit Credit: Getty Images - Getty The deal is also good news for inflation.
The BoE had said that, if we left without a trading agreement, growth would slow down and inflation would surge as a result of a weaker pound.
They said the hit to the economy, particularly after the coronavirus pandemic, could be devastating.
Official Brexit documents show banks in both sides will remain accountable to the public.
BUSINESS Can I work abroad in the EU?
Yes, but it'll be harder than it was.
Brits won't have the complete freedom to work and start a business in the EU, as we previously did.
Short-term business trips are fine, although you'll need a visa for anything longer than 90 days.
Those in very highly-skilled jobs who have been seconded to the EU will face more relaxed restrictions.
EU negotiator Michel Barnier and his counterpart in the UK, David Frost, are working throughout Christmas on the deal Credit: AP:Associated Press The triumphant PM told Brits the deal gives us control back Credit: Crown Copyright Managers are allowed to stay for up to three years and trainees for one year.
But it's probably going to be tougher for doctors, nurses, dentists, engineers and other people in specialisms to practise abroad.
That's because qualifications issued in the UK won't be automatically recognised any more.
Instead, they will have to seek new recognition in whichever member state they choose to go to.
STUDY Can I study abroad?
Yes, but it'll be slightly different.
The UK has pulled out of the EU-funded student exchange programme Erasmus.
The student exchange programme which was established in 1987.
It gives people from the EU the chance to study abroad at universities in member states.
Since 1987 more than 300,000 UK students have studied or worked in Europe on the Erasmus exchange programme.
But that's out - and instead, the Government will allow students the chance to compete for places on a new scheme named after Bletchley Park code breaker Alan Turing.
Successful applicants will be able to travel to other universities around the world.
Boris Johnson said the deal represents a victory for the UK The country will 'thrive' outside the EU, the PM said
Boris Johnson confident UK will be as safe after Brexit trade deal with EU done