British citizen in the context of "People of Northern Ireland"

The right of abode (ROA) is an immigration status in the United Kingdom that gives a person the unrestricted right to enter and live in the UK. It was introduced by the Immigration Act 1971 which went into effect on 1 January 1973. This status is held by British citizens, certain British subjects, as well as certain Commonwealth citizens with specific connections to the UK before 1983. Since 1983, it is not possible for a person to acquire this status without being a British citizen.

The right of abode is the most common immigration status in the UK due to its association with British citizenship. However, it should not be confused with the indefinite leave to remain (ILR), another form of long-term residency status in the UK which is more comparable to other countries' permanent residence status.

Sir Andre Konstantin Geim (Russian: Андре́й Константи́нович Гейм; born 21 October 1958; IPA1 pronunciation: ɑːndreɪ gaɪm) is a Russian-born British physicist working in England in the School of Physics and Astronomy at the University of Manchester.

Geim was awarded the 2010 Nobel Prize in Physics jointly with Konstantin Novoselov for his work on graphene. At that time he was a Dutch citizen. He later became a British citizen to accept a knighthood and considered himself Dutch-British. Geim is Regius Professor of Physics and Royal Society Research Professor at the National Graphene Institute. Geim was previously awarded an Ig Nobel Prize in 2000 for levitating a frog using its intrinsic magnetism. He is the first and only individual, as of 2025, to have received both Nobel and Ig Nobel prizes, for which he holds a Guinness World Record.