“A British citizen who had not been resident in the United Kingdom for over 15 years could not vote in the United Kingdom parliamentary election within the meaning of section 1(3) of the Representation of the People Act 1985, as amended. The statutory rule disenfranchising a citizen who had not resided in the UK for 15 years (‘the 15 year rule’) did not infringe the freedom of European Union citizens to move to other member states of the union.”
WLR Daily, 25th October 2012
Source: www.iclr.co.uk