Plans for the £175 million Garden Bridge over the Thames were also questioned during today's Mayor’s Questions session with Boris Johnson.
Although two councils have already approved planning permission, Westminster agreed on the grounds that TfL would be responsible for the upkeep of the bridge.
The decision is considered a controversial one as the proposed bridge could has been objected to as it may spoil the protected views of St Pauls Cathedral.
Officials at the cathedral said the bridge over the Thames will "ruin" views of St Paul’s.
The Garden Bridge Trust deny the claims, saying the bridge would offer views of the Cathedral that are currently not possible.
The final decision on the bridge’s go ahead , or not, is expected to be given by the Mayor on Friday.