Rights groups have rounded on David Cameron, saying his description of migrants in Calais as a "swarm of people" trying to reach Britain was dehumanising.

The prime minister's words brought into focus the emotive language used by politicians and the media about the migrants in makeshift camps in the French port town.

Speaking during a visit to Vietnam, Cameron told ITV News attempts to enter the UK had increased because "you have got a swarm of people coming across the Mediterranean, seeking a better life, wanting to come to Britain because Britain has got jobs, it's got a growing economy, it's an incredible place to live".

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