206, I think the website page
Fly in to CPOP is just an advert.
It says, "our fleet of helicopters will fly you or your group directly to Cholmondeley‘s Heliport located right in the centre of the event.", which suggests to me that it might be more fruitful to try this link
Contact Us
Or by using info gained from post #2;
Booking Information - heli-support
LANDING REQUEST, INDEMNITY & PILOT BRIEF CPOP 2013 Please complete the Landing Request Form & The Indemnity Form for your attendance at CPOP (To reach us by at least 48hrs before the event) Please ensure you also read and comply with the Pilot Brief Ground Services are provided by HELI-Support Ground Services Limited for the Landing and Parking of your Helicopter(s)