In November 2006, Byrne was responsible for a change to Immigration Rules preventing migrants who had entered under Britain's Highly Skilled Migrant Programme (HSMP) having their permission to remain in Britain extended, unless they could show both that they had been earning at least £32,000 pa while in Britain and also that they had a good knowledge of English. This change was controversial because it applied retrospectively to immigrants who had entered Britain under the old rules, meaning the British Government had "moved the goalposts"–a degree became effectively an essential requirement, regardless of the skills or economic contribution that an individual could demonstrate.