Two minature statues which are part of an art project raising awareness of London's refugees have gone missing. Find out why they were created, in this interview with artist Marcus Crocker, and Hugo Tristram from the British Red Cross.
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Paramedics were on standby outside the police cordon as armed officers stood by the property.
A team of researchers has taken samples from the ten busiest London Underground lines to work out which are the dirtiest.
The action comes on top of an emergency timetable which has seen hundreds of trains a day being axed.