John Dickie, from business lobby group London First, says the length of time non-EU passport holders have to wait to get into the country is "damaging to business" and "bad for the whole of the UK economy."
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Experts say a trial into an early Ebola vaccine shows it is safe, but it did not perform as well as had been hoped.
Frequent snowfall expected across much of the north this evening and strong northeasterly winds will make it feel noticeably cooler.
A Jewish leader was forced to escape from the camp through a window last night, when he was locked in during a TV broadcast.