In accordance to the UK Immigration Law, an immigrant who obtained a British citizenship may not need to give up their nationality in order to have dual citizenship. canada citizenship by investment Some countries do not recognise a dual citizenship status and they may have to give up their former nationality and sometimes a British citizenship is not recognised by a country of the immigrant. But in many countries, dual citizenship presents both countries' privileges. Any individual who contemplates in acquiring a British citizenship must be aware of the rules or laws of their own country.

There are British citizens who became a citizen of another country without giving up their British nationality. However, there are cases where some countries require you to renounce your British citizenship in order to acquire citizenship in their country. The British protected individuals and British subjects however, are an entirely different situation; they will ultimately lose their citizenship if they have acquired the citizenship of another country. For those who have special ties with the Republic of Ireland, they will have the option to retain their citizenship or can have a dual citizenship.

The British citizens can have access to the assistance of the British consuls if they have issues away from home like if they become ill, a victim of felony, accused or committed a crime, or even getting the assistance to settle in a new country. The British consulate will take necessary actions for most of these common issues to protect their citizens. If an individual has dual citizenship, however, he or she may not be allowed a British consulate assistance if they are in their country of origin. However, if the individual travels to their country of origin and renounced their citizenship to that country, then they will be allowed to seek help from the British embassy. They should write to the Commonwealth Office or a Foreign office that they need such assistance and they have to prove that they have indeed renounced their citizenship in their country of origin and show their British passport and documents that they are British citizens according to the UK immigration law.

Under the UK immigration law, before a British citizen, subjects, British nationals and protected persons can renounce their British citizenship, they must first show proof that they have acquired a nationality or citizenship of the country they wish. It is important however, that the individual must be at least eighteen years of age or older, or younger than eighteen but married and must have a normal mental state for their own welfare. If they are resolved to give up their British citizenship, they must fill out and sign a document called the RN1. The British citizenship will be relinquished by the time it is registered. If a British citizen fails to attain a new citizenship after six months, they will still be a British citizen.