I strongly believe that with some minor modifications to the primary plans, St James Ditch beneath the bridge on entering the new City Gate could easily be turned into a much needed underground car park.
There already existed a parking facility, with cars entering from Sa Maison and parking at the Yellow Garage. There also existed a lift taking one straight up to what is now to become the new parliament building and the surrounding gardens.
I believe there is still time to make the necessary modifications and utilise this huge underground space for parking against payment.