when voters go the polls to decide on a proposal to cap their population at 10 million, a move that has exposed divisions about immigration in the Alpine nation. The move is backed by the right-wing Swiss People's Party, which describes it as a "sustainability initiative" aimed at easing pressure on housing, public services and the environment. Dubbing it a "chaos initiative", the government, other political parties, business leaders and trade unions argue it will deprive hospitals and hotels of much needed staff, and damage hard-won relations with the European Union, leaving non-EU member Switzerland isolated in a very risky world.

Switzerland's population has grown rapidly since 2002, when it stood at 7.3 million. Now it is 9.1 million, 27% of whom are Swiss residents who were born abroad. Switzerland's system of direct democracy means all major decisions are taken via the ballot box. Campaigners simply have to gather 100,000 signatures to ensure a nationwide vote. Many voters are concerned by overcrowded trains, expensive apartments and rising health costs. The latest opinion polls indicate this could be a very close vote. They suggest voters are inching towards a no vote by a wafer thin margin, with 52% opposed - but polls remain divided, with 45% saying they are in favour of the proposal and a significant number of voters still undecided. (BBC)