Susan Alexander says her son's killing was "wholly avoidable". Whatever he was doing he did not deserve to be summarily killed @itvlondon
Met comm Bernard Hogan Howe accepts all recommendations made by judge in Azelle Rodney inquiry report @itvlondon
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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.