Two people have serious leg injuries after the bus crash in Kennington, the London Ambulance Service said.
Press Association reporter James Edgar tweeted:
London ambulance service say 2 serious leg injuries. 1 adult male, 1 adult female.
One taken to Kings, one to George's. Both by road supported by air ambulance
More top news
Mr Corbyn will highlight increases of almost 6% in council tax bills across the country.