Buses from London accept all types of assistance dogs. The only condition is that the dog does not block the passage. Learn more about accessibility on buses. The buses constitute a means available to move to London. The 8000 London buses are now low floor for easy wheelchair access. The ramps on all buses must still be operable. Any bus with the ramp is defective is systematically withdrawn from service in order to always ensure accessibility. Buses are free for wheelchair users and for holders of the Subscription freedom. Children and young people under 18 in full time education can also take the bus for free.