This thesis contains an analysis from a legal perspective, which can enlighten what kind of economic and legal consequences that will occur, when Britain withdrawals from the European Union. Since the vote that happened in United Kingdom (UK) in June, there have been a lot of uncertainties, on how the process on withdrawal will happen, but also of how the future will be for the European citizens, that resides in UK or will travel to UK. With these questions, this thesis will treat the questions on how triggering article 50 TEUF will happen and the doubts there are about the process. Though the main focus in the thesis is what the consequences are for workers and their families that are residents in the UK and those who will want to travel to UK. As every legal change, will lead to an economic change, it is therefore relevant to analyze how the British economy will react to these changes. The legal changes which occur by the UK withdrawals, are all the legal right citizens have gained from the European law, will be void, since UK no longer will be a part of the EU, and therefore cannot force them to maintain European legal rights. As a European citizen staying or traveling to the UK, this will have consequences. For a European citizen the consequences of a Brexit, are art. 45 TEUF will be void, this means that European citizens, no longer can travel to and stay in UK, without a kind of permit. As a part of art. 45 TEUF being void, also mean that workers and self-employed, no longer will be able to demand the same conditions, that the UK citizens have. Another consequence is that workers and self-employed persons will not have the rights to British welfare anymore. Not only will Brexit affect the right an EU citizen has, but also their family members that is staying or traveling with them, since family members have derived right, this will also affect family members’ rights. Because of legal changes, it will affect the British economy. Since the the legal consequences will affect the possibilities to travel to UK and working in UK, and citizens may choose not to work in UK, will mean for the labor market, that there will be a shortage of workers in some sectors. This will lead to the labor market not being able to use these sectors at its best or even worse, not be able to maintain them. There will happen some changes in the British wages, the reason for that, is that fewer immigrates to UK, will mean fewer workers and the wages will slowly rise. Theory shows that immigrants is a part of the British trade, where UK trade with workplaces for labor. If the number of immigration rises, there will be more labor accessible and therefore create market competition, and force the wages down. Where the opposite result will happen if UK decreases the number of immigrants and therefore reduce the competition on the market and the wages will increase. Though it is shown by a professor, that the effects of immigration on the wages are relatively small. As a result of this thesis, it is possible to see that there will be some consequences for European citizens right of free movement and workers right for the same conditions as the British citizen, this will also affect the derived right for the family members. Even though the immigration will be less and the available labor will fall, it will not have a big effect on the wages in UK.