Who is paying for London's Garden Bridge?
Newsnight has learned the funding gap for the Garden Bridge project is £22m more than previously thought.
The Garden Bridge was conceived of by the actress Joanna Lumley as a memorial to Princess Diana.
The plan is for the bridge to run between Temple Underground Station and the South Bank, and for it to be covered in trees and shrubs.
Evan Davis asked Lord Davies, Chairman of the Garden Bridge Trust, to explain exactly what the funding situation is.