Green belt M11 travel hub progresses to next stage

My wife and I often walk around Trumpington and through the current park and ride car park and I don't think we've ever seen the car park anywhere close to capacity so I can't imagine why this extra car park is required.

Of course, the smart money is on the fact it will be required when the congestion charge kicks in, but that'll be before this "hub" is anywhere close to being completed!