Our new car keeps getting delayed. What can we do?

In February, we purchased a new Range Rover Evoque from a dealer and outlined that we needed a car by June 18th as our current company car would be going back and this new order was our personal replacement....

Can a dealer legally change the delivery time for a new car twice?

Can a dealer legally change the delivery time for a new car twice? I asked for a car to be a 1 September registration and a deposit was taken on that basis. I was then told that the car had to be registered...