Trenton Oldfield, who disrupted thisyear's Boat Race by swimming into the path of the crews on the Thames, wastoday sentenced to six months in jail at Isleworth Crown Court after he wasconvicted of causing a public nuisance.
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The meeting was arranged in the wake of Wednesday's terrorist murder of four people in Westminster.
Dozens of women gathered on Westminster Bridge to form a human chain in a show of solidarity with the victims of Wednesday's terror attack.
In a wide-ranging Peston on Sunday interview, he said Parliament security needs reviewing and the PM's counter-terror strategy is flawed.