A father-of-two has died after being pushed under a moving lorry as he chased a gang which tried to rob his cash and carry.
Shammi Atwal has been praised by police for confronting the gang members, who were armed with metal bars and a sledgehammer, and defending his wife.
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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.