Bus services are facing the axe as councils struggle to fund free travel for elderly people.
Government funding for free, off-peak travel for elderly and disabled people has fallen by 39% since 2010, according to the Local Government Association (LGA).
It added that councils are being increasingly forced to subsidise this concessionary travel at the cost of other essential services.
The LGA said that Buckinghamshire, Cumbria and Somerset were among county councils cutting back on services due to funding problems.
Two people, including a 19-year-old woman, are in a critical condition and 30 others are injured after a bus crashed into a tree.
The number 59 double-decker bus swerved to avoid another vehicle and hit the tree in Kennington, south London, near the Imperial War Museum shortly before 11am.
Two police officers were among those on board when the bus crashed.
Passenger Jesse Fox explained: "The tree came basically right through the front, into the seats. The whole front of the bus was trashed.
"I think a lot of the people on the lower deck - injured and not injured - got off very quickly because the doors were opened very quickly."
"The scene is now clear of all patients; they have all been taken to hospital," a London Ambulance spokesman said.
Two people have serious leg injuries after the bus crash in Kennington, the London Ambulance Service said.
Press Association reporter James Edgar tweeted:
Two people who were trapped on the crashed bus in south London have now been removed, Press Association reporter James Edgar said.
Metropolitian Police said a total of 30 people were injured in the bus crash in south London.
Two people remain trapped on the bus, a statement said.
Press Association reporter James Edgar said a paediatrician first on the scene treated people for shock, cuts, bruises and facial injuries.
Two off-duty police officers are among the 20 people injured in a bus crash in south London, police said.
One man and a woman are still trapped. Two other people are in critical condition.
The tree was embedded in the front of the bus and emergency crews were using cutting equipment to gain access to one side of the vehicle.