Ben Chu and Tamara Kovacevic
BBC Verify
Five years ago, connected 31 January 2020, the UK near the European Union.
On that day, Great Britain severed the governmental ties it had held for 47 years, but stayed wrong the EU azygous marketplace and customs national for a further 11 months to support commercialized flowing.
Northern Ireland had a separate arrangement.
Brexit was hugely divisive, some politically and socially, dominating governmental statement and with arguments astir its impacts raging for years.
Five years connected from the time Britain formally near the EU, BBC Verify has examined 5 important ways Brexit has affected Britain.
1) Trade
Economists and analysts mostly measure the interaction of leaving the EU azygous marketplace and customs national connected 1 Jan 2021 connected the UK's goods commercialized arsenic having been negative.
This is contempt the information that the UK negotiated a escaped commercialized woody with the EU and avoided tariffs - oregon taxes - being imposed connected the import and export of goods.
The antagonistic interaction comes from alleged "non-tariff barriers" - clip consuming and sometimes analyzable caller paperwork that businesses person to capable retired erstwhile importing and exporting to the EU.
There is immoderate disagreement astir however antagonistic the circumstantial Brexit interaction has been.
Some caller studies suggest that UK goods exports are 30% little than they would person been if we had not near the azygous marketplace and customs union.
Some suggest lone a 6% reduction.
We can't beryllium definite due to the fact that the results beryllium heavy connected the method chosen by researchers for measuring the "counterfactual", i.e what would person happened to UK exports had the state stayed successful the EU.
One happening we tin beryllium reasonably assured of is that tiny UK firms look to beryllium much adversely affected than larger ones.
They person been little capable to header with the caller post-Brexit cross-border bureaucracy. That's supported by surveys of tiny firms.
It's besides wide UK services exports - specified arsenic advertizing and absorption consulting - have done unexpectedly good since 2021.
But the moving presumption of the Office for Budget Responsibility (OBR), the government's autarkic authoritative forecaster, is inactive that Brexit successful the semipermanent volition trim exports and imports of goods and services by 15% comparative to otherwise. It has held this presumption since 2016, including nether the erstwhile Government.
And the OBR's different moving presumption is that the autumn successful commercialized comparative to different volition trim the semipermanent size of the UK system by astir 4% comparative to otherwise, equivalent to astir £100bn successful today's money.
The OBR says it could revise some these assumptions based connected caller grounds and studies. The estimated antagonistic economical interaction could travel down if the commercialized interaction judged to beryllium little severe. Yet determination is nary evidence, truthful far, to suggest that it volition crook into a affirmative impact.
After Brexit, the UK has been capable to onslaught its ain commercialized deals with different countries.
There person been caller commercialized deals with Australia and New Zealand and the authorities has been pursuing caller agreements with the US and India.
But their interaction connected the system is judged by the government's ain authoritative interaction assessments to beryllium tiny comparative to the antagonistic interaction connected UK- EU trade.
However, immoderate economists reason determination could inactive beryllium imaginable longer word economical benefits for the UK from not having to travel EU laws and regulations affecting sectors specified arsenic Artificial Intelligence.
2) Immigration
Immigration was a cardinal taxable successful the 2016 referendum campaign, centred connected state of question wrong the EU, nether which UK and EU citizens could freely determination to visit, study, enactment and live.
There has been a large autumn successful EU migration and EU nett migration (immigration minus emigration) since the referendum and this accelerated aft 2020 owed to the extremity of state of movement.
But determination person been ample increases successful nett migration from the remainder of the satellite since 2020.
A post-Brexit migration strategy came into unit successful January 2021.
Under this system, EU and non-EU citizens some request to get enactment visas successful bid to enactment successful the UK (except Irish citizens, who tin inactive unrecorded and enactment successful the UK without a visa).
The 2 main drivers of the summation successful non-EU migration since 2020 are enactment visas (especially successful wellness and care) and planetary students and their dependents.
UK universities started to enlistee much non-EU overseas students arsenic their fiscal concern deteriorated.
The re-introduction of the close of overseas students to enactment and enactment successful Britain aft graduation by Boris Johnson's authorities besides made the UK much charismatic to planetary students.
Subsequent Conservative governments reduced the rights of radical connected work and student visas to bring dependents and those restrictions person been retained by Labour.
3) Travel
Freedom of question ended with Brexit, besides affecting tourists and concern travellers.
British passport holders tin nary longer usage "EU/EEA/CH" lanes astatine EU borderline crossing points.
People tin inactive sojourn the EU arsenic a tourer for 90 days successful immoderate 180 time play without requiring a visa, provided they person astatine slightest 3 months remaining connected their passports astatine the clip of their return.
This applies some to the UK citizens going to the EU and vice versa.
However, a bigger alteration successful presumption of question is connected the horizon.
In 2025, the EU is readying to present a new physics Entry Exit System (EES) - an automated IT strategy for registering travellers from non-EU countries.
This volition registry the person's name, benignant of the question document, biometric information (fingerprints and captured facial images) and the day and spot of introduction and exit.
It volition regenerate the manual stamping of passports. The interaction of this is unclear, but immoderate successful the question assemblage person expressed fears it could perchance adhd to borderline queues arsenic radical permission the UK.
The EES was owed to beryllium introduced successful November 2024 but was postponed until 2025, with nary caller day for implementation yet set.
And six months aft the instauration of EES, the EU says it volition present a caller European Travel Information and Authorization System (ETIAS). UK citizens volition person to get ETIAS clearance for question to 30 European countries.
ETIAS clearance volition outgo €7 (£5.90) and beryllium valid for up to 3 years oregon until someone's passport expires, whichever comes first. If radical get a caller passport, they request to get a caller ETIAS question authorisation.
Meanwhile, the UK is introducing its equivalent to ETIAS for EU citizens from 2 April 2025 (though Irish citizens volition beryllium exempt). The UK licence - to beryllium called an Electronic Travel Authorisation (ETA) - volition outgo £16.
4) Laws
5) Money
The wealth the UK sent to the EU was a arguable taxable successful the 2016 referendum, peculiarly the Leave campaign's assertion the UK sent £350m each week to Brussels.
The UK's gross nationalist assemblage publication to the EU Budget successful 2019-20, the last fiscal twelvemonth earlier Brexit, was £18.3bn, equivalent to astir £352m per week, according to the Treasury.
The UK continued paying into the EU Budget during the modulation play but since 31 December 2020 it has not made these contributions.
However, those EU Budgets contributions were ever partially recycled to the UK via payments to British farmers nether the EU's Common Agricultural Policy (CAP) and "structural funding" - improvement grants to enactment skills, employment and grooming successful definite economically disadvantaged regions of the nation. These added up to £5bn successful 2019-20.
Since the extremity of the modulation play UK governments person replaced the CAP payments straight with payer funds.
Ministers person besides replaced the EU structural backing grants, with the erstwhile authorities rebranding them arsenic "a UK Shared Prosperity" fund.
The UK was besides receiving a negotiated "rebate" connected its EU Budget contributions of astir £4bn a year - wealth which ne'er really near the country,
So the nett fiscal payment to the UK from not paying into the EU Budget is person to to £9bn per year, though this fig is inherently uncertain due to the fact that we don't cognize what the UK's publication to the EU Budget would different person been.
The UK has besides inactive been paying the EU arsenic portion of the authoritative Brexit Withdrawal Agreement and its fiscal settlement. The Treasury says the UK paid a nett magnitude of £14.9bn betwixt 2021 and 2023, and estimated that from 2024 onwards it volition person to wage different £6.4bn, though dispersed implicit galore years.
Future payments nether the withdrawal colony are besides uncertain successful portion due to the fact that of fluctuating speech rates.
However, determination are different ways the UK's finances remained connected with the EU, abstracted from the EU Budget and the Withdrawal Agreement.
After Brexit took effect, the UK besides initially stopped paying into the Horizon scheme, which funds pan-European technological research.
However, Britain rejoined Horizon successful 2023 and is projected by the EU to wage successful astir €2.4bn (£2bn) per twelvemonth connected mean to the EU fund for its participation, though historically the UK has been a nett fiscal beneficiary from the strategy due to the fact that of the ample stock of grants won by UK-based scientists.
The future
There are, of course, a ample fig of different Brexit impacts which we person not covered here, ranging from territorial sportfishing rights, to farming, to defence. And with Labour looking for a re-set successful EU relations, it's a taxable that promises to beryllium a continuing root of statement and investigation for galore years to come.