By March 29th 2019 the British Government had failed to reach an agreement with the EU on the terms of its departure from the European Union.
The government collapsed, as a result of a vote of no-confidence. The EU agreed that, because there was no state government to 'act', the UK could not 'leave' until there was a legal government to execute that act.

The party has repeated the vote of no confidence, but is unsuccessful. The Pound Sterlin loses strength against major currencies
There had been frantic "avoiding the No Deal" negotiations between the British Government and the EU since mid-January 2019, when the Government's Brexit proposal had been defeated in Parliament, but negotiations proved more tricky than expected. A three-month extension to the Article 50 deadline bought some extra time to avoid complete chaos at Dover and other ports.
What happened next surprised everyone except the English (note, not the "British"). Nothing much. The English are a phlegmatic bunch and as my niece's husband said just after the initial vote; things will work themselves out, life will go on.
Nevertheless, the British are still expecting to have to business opportunities with non-EU countries in terms of export and imports. It is also expected that EU Citizens work in the British will have more income taxes deducted.
Everyone behaved as if it was the end of the world, but actually with the exception of some panic buying, stock markets tanking and the Pound being hit hard life pretty much carried on as normal and the Government did not fall apart.
There is increased realization on the potential impacts of Brexit among British politicians and people, including trade deficit and commodity price hike. This keeps the parliament in limbo and they decide to wait for the fresh mandate in 2022 to make the decision.
no surprise... everyone knew that this would have been the outcome. The party in power was defiant: we will do well. But they suddenly had no one to blame for for the problems they had created. For sometime still, blaming Europe could still worked. But soon, they will have to take responsibilities. They planned to lose the next elections, to pass on the blame.
In the course of several years UK and EU reached agreements on all important aspects of life after Brexit, and international relations. UK agreed to make exit payments to EU, which affected the UK for several years. After a decade Britain regreted the exit and the Government realising the need in EU for its own sake took steps to reunite by molding public opinion and taking political steps.
UK separates itself from the EU & creates a ripple of nationalistic sentiment in other EU countries
The British public realised the folly of their ways and demand a halt to Brexit
As she had survived a Conservative Party leadership contest in December, Theresa May was still Prime Minister. The Labour Party had decided to hold off putting forward a motion of "no confidence" in parliament as public opinion had gradually shifted in support of the government after the defeat of the Brexit proposal in January.
All major economies split away from EU and only few remain (France remains). However, in light of global threats another form of union was initiated my European countries.
that will results in less interest of people to seek work in England.
and the EU and the UK signed trade agreements and the UK was able to move ahead with a new invigorated trade plan across the globe. UK took a short term stumble for 5 years as a recession loomed, but after that it was able to re-invigorate business as a global force in trade. The UK also stopped relying on importing everything and local home grown produce and locally produced products flourished creating a whole stream of business. The UK public also got a short sharp shock and realized UK was no longer "ruling the global waves" and that it in the global economy it is now on an even keel with other countries. People began to appreciate Government, Governance, Health and Education services that we are so lucky to have.. and nobody could continue to blame "EU" for all our woes.. ultimately the country a decade later became more accountable for its own highs and lows..
Except... it did not. Everyone had expected the initial panic. And, being (the British) considerate people they had prepared for that. And then panic was gone, everyone thought that life would go on as usual, again. As my niece's husband said. What was not expected where the small changes yet to come. Small, but many. Building up.
The life keeps going, but Brexit keeps dividing politics. The right-wing political groups get increased noise, but have limited success. The migrants and minority groups are scared. Fears persist, and economy tumbles, but people are still humble!
The loss of Vote of No confidence vote makes the government popular again. Parliament is divided and fierce debate rages. Britain exists and is left vulnerable to economic chaos.
The new election was fought not along party lines but on the basis of 'revoke article 50' or not. The 'revoke article 50' party won with a resounding majority, and without going to a second referendum, article 50 was revoked, as the ECJ ruling permitted. Everyone breathed a sigh of relief, even those who had original voted leave.
During this period the current government collapsed, but the Tory party remained with the majority as divided as ever. The leader of the Labour Party was forced to resign and the new leader was explicitly "Remain". A constitutional crises then developed over who should ultimately be responsible for the negotiations - to reverse 400 years of tradition that Parliament is subservient to the executive, or should instruct the executive. This essentially consumed the all of the government's and Parliament's time and social conditions in the UK worsened as no other issues were being discussed.
Parliament takes the extraordinary step of enacting a second referendum
In December 2020, the transition period ends without an agreement. However, the Brexit process becomes a major milestones for UK to make a comprehensive free trade agreement.
Remain wins a second vote and Parliament cancels Brexit
Many acquaintances went. The barista and its nice cappuccino, for example. She always put a smile on your face.
“The UK economy picked up, a strong Buy British lean foods campaign that united communities across the UK to become more self-sufficient and purchase locally made products including in-season fruit and vegetables led to significantly reduced carbon emissions and less reliance on the EU and the Far East imports and reduced obesity tenfold! Meanwhile, UK exports grew as the new Green Party-led government as we all enjoyed regular Sahara summers and warm winters that were a consequence of global warming, while the Norfolk Broads became submerged by rising sea levels. Scotland, Northern Ireland, England Wales relations improved incredibly and the country moved into a golden era of holistic circular growth becoming the worlds largest tourist center, (after France now run by a fascist government which took over after EU subsidies for farmers ran dry as an African grape disease was blown in, seemingly on the climate change induced Sahara winds) that toppled the German banks that were heavily leveraged in the French Farmers and Tourist industry and so ended the EU!”
After much heated debate about what options to put on the referendum, they were whittled down to 'stay' or 'leave'. This time, the remainers got their campaigning act together and explained to non voters why staying was important. The leave vote went down slightly but the remain vote went up and remain they did.
And then one day, someone blew up an inspection post in the border of Northern Ireland and Ireland. But then the Brits never did care a shit about the Irish.
That resulting the British decided to import workers from Asian countries offering good benefits for them if willing to come to England.
The Government also lost the second vote in Parliament on the Brexit proposal, albeit with a smaller margin than the first time. The Prime Minister went back to Brussels to plea for further EU concessions to make the deal more palatable, but the EU 27 still held off on making any additional offers, as there was no clarity what kind of Brexit deal could get a majority in the UK Parliament.

Theresa May goes to negotiate with the EU. But the EU maintains its earlier stance and states they will keep to the EU protocol. Theresa returns to parliament and Britain exist the EU suffering a depression of the sterlin pound by 25%.
Leave votes feeling politically alienated and so begins a decade of turbulence as far right parties are bolstered.
Much bitterness ensued, with complex protests which covered anti immigration, anti austerity and generally just a general wail of pain breaking out in the most impoverished parts of the country. The Tory government fell, and labour was elected with a landslide.
In the end, the 3-month extension to the Article 50 deadline did not help. Prime Minister May had avoided at all cost to split the Conservative Party, but as she could not muster a majority within her own ranks for her plan, the “No Deal Brexit” came to be; the “red lines” on the British side could not be squared with the “red lines” on the EU side. As had been predicted by the Remain camp and independent observers, the British economy contracted over the next five years, and it sparked social unrest that was reminiscent of, but far worse than the “gilets jaunes” protests in France in 2018-2019. The “No Deal Brexit” also resulted in a hard border between Northern Ireland and the Republic, but that in turn led to a referendum for reunification of Ireland, and the “Yes” vote carried the day on that one. The EU economy also suffered, but nowhere as much as the British economy. A range of “Brexit compensation measures” brought some relief in areas and sectors that were most affected by the Brexit.
So... here you are... the faces of the people filling gaps in services changed. From "European foreigners" to "world foreigners". For the privileged who could access these services, not much changed. The unprivileged were the one who lost: the benefits paid were at the cost of other services, of cheaper prices. The irony is that so many of the unprivileged had voted for Brexit, hoping to get more. They got different faces around them... And they got the same - if not more - inequality.
British will marginally take advantage of cheaper workforce coming from third world countries and eventually will strengthen its business position with EU countries". 
However, the policy made the existing tension which initially gave rise to Brexit, escalates even more. In the end, the government decided to limit the foreign workers using very strict criteria.
The majority of the businesses believe that the Brexit will have a negative impact on economic growth. After no-deal, Britain starts working on industrial strategy, labelled an innovative and far-reaching, which promises to enable businesses to seize many opportunities in EU and outside.
The globe shifted to a global recession that lasted three years, by which time everyone realized the new technological age of AI and robots had begun. Over the next 20 years a global economic boom continued, but environmental degradation and prices of raw materials quadrupled. A China-US space race began and finally ended with those who had enough resources moving to the new worlds in our solar system, while the rest of the planet were left behind on a planet that slowly began to die.
The British people accept the outcome and Britain exist. Despite anxiety in the neighboring economies and business, there is a new wave of enthusiasm to develop new trade links and though fives are gloomy Britain re emerges a powerful economic giant.
At which point everyone completely forgot about hating the germans, the french, the spanish and especially the polish and went back to hating the Irish. What comes around goes around.