A series of marches by a right-wing group has been banned amid fears of violence on the streets.
Policing minister Damian Green agreed to the Metropolitan Police request for the ban to stop serious public disorder ahead of marches by the English Defence League in Waltham Forest, north-east London, and three surrounding boroughs.
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London's mayor was shown the site in Tulse Hill where a 17-year-old boy was left fighting for his life after being shot in last week.
Jet2 said there had been an "extremely disruptive passenger" on board its flight from Stansted to Dalaman in Turkey on Saturday.
Around 2,000 staff will be balloted, including those working in engineering, signals, electrical, track and control centres.