Citizens' rights: EU chief Brexit negotiator calls for 'more ambition' from UK

Michel Barnier urges more clarity and guarantees after Theresa May set out fine print of offer, which has already been described as 'worrisome'

The EU's chief Brexit negotiator, Michel Barnier, has responded to the publication of Theresa May's offer on citizens' rights by calling for "more ambition, clarity and guarantees" from the British government.

The UK prime minister had hoped to secure an early agreement on the principles of her approach when she offered it to EU leaders last week, but the cool response during the summit in Brussels failed to get any warmer with the production of a 15-page document on Monday afternoon.