A Parliamentary safety group is urging London Mayor Boris Johnson to hold a safety summit following the spate of cyclists' deaths in the capital. There was "a need for urgent action", said the Parliamentary Advisory Council for Transport Safety.
Police are appealing for witnesses after an incident involving a 205-route bus, in which a cyclist, believed to be in his 30s, was killed.
He was not wearing a helmet at the time of the collision, police added.
The victim, who has not yet been identified, was taken to an east London hospital. Police added there had been no arrests and inquiries continued.
The unlicensed events unfolded on Saturday night at Clapham Common and Tooting Bec Common.
A 37 year old man who was taken to hospital after getting into difficulty in a stretch of water near Maidenhead has died.
Jonty Bravery, who is mentally ill, has been jailed for 15 years after throwing a six year old boy from the Tate modern balcony.