Thanks for the report abl1011. I hope that you send this to HAL. It is no surprise that their website gives no names but I hope someone in this cabin knows who the 'MD of Wheel Chairs' is:
Heathrow Airport Limited
The Compass Centre, Nelson Road, Hounslow TW6 2GW
Since the name quoted in the BBC article at the start of this thread is: John Holland-Kaye, Heathrow CEO, that's a good place to start!