The incident happened on the same tram network where seven people died in a crash last November.
RMT staff have walked out of London Bridge station in a row over a staff member sacked over an incident with an alleged fare dodger.
The swarm filled the air on Greenwich Church Street on Tuesday.
The ad attracted 14 complaints that it promoted an unhealthy and competitive approach to dieting.
The restoration of Tooting Common’s “rare” and “valuable” grassland habitat has begun.
The driver, Alfred Dorris, was arrested at the scene and questioned on suspicion of manslaughter before being bailed until May.
The proposed north-south rail line would run across London between Hertfordshire and Surrey.
A coroner has demanded Transport for London do an "urgent review" of the blue paint used on cycle superhighways after a motorcyclist died earlier this month.
Transport minister Andrew Jones said the changes would deliver a better standard of services.