Boris Johnson will be meeting apprentices at the Crossrail Tunnelling Academy in Ilford to kick off National Apprenticeship Week. A new concessionary travel scheme will help hard working apprentices.
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Police arrived at the 73-year-old's home after Alfie chased a delivery man.
Officers believe the three assaults are linked and are appealing for information about the suspect.
Nine addresses in Lewisham were searched and 13 arrests made early on Tuesday morning in a planned, intelligence-led operation.