A number of countries allow you to keep your current Citizenship when you become a citizen of Great Britain. This is often referred to as 'dual Citizenship.' However, some countries do not recognize 'dual Citizenship' and when you naturalize as a United Kingdom Citizen; you may forfeit your previous Citizenship and passport. We would urge you to check with the relevant authorities of the country/ies with which you hold Citizenship in order to be fully aware of the effect/s that a grant of UK citizenship may have on your present Citizenship/s.
You do not need to give up your present citizenship or nationality to become a British citizen.
Many countries will not let you have two nationalities (dual nationality). If you become a British citizen and are a national of a country which does not allow dual nationality, the authorities of that country may either regard you as having lost that nationality or may refuse to recognize your new nationality. Before you apply for British citizenship you may wish to check what your position would be with the authorities of the country of which you are a citizen.
British Naturalization, also known as British Citizenship, is a concluding UK immigration service available to foreign nationals with permanent resident status (i.e. with Indefinite Leave to Remain in the UK or ILR) and has spent a minimum of three - five years living and working in Great Britain. Unlike visas for short term residency such as UK visit visas, travel visas or work permits, the British Naturalization service offers permanent residency in the UK as a British citizen and imposes no time restrictions upon the holder. A UK work permit is not required and successful candidates are free to seek and undertake work in Great Britain without constraint.