The Met Police have charged two teenagers with the murder of 19 year-old Charlie Burns in Homerton on Monday.
19 year-old Ashan Crosdale from the Hackney area and a 16 year-old boy will appear before magistrates on Friday.
More top news
The operation carried out by Westminster City Council led to the seizure of £8,000 worth of cigarettes.
Armed troops have been stationed around Parliament to free up armed police to patrol the streets in the wake of the Manchester bomb attack.
Chelsea had planned an open top bus tour to show off the Premier League trophy and hope to add the FA Cup in Saturday's final with Arsenal.