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.....
HAL “own” this but as with almost everything in the U.K. the PRM service has been subbed out, in this case to a company called Omniserve.
Contact details for both HAL and Omniserve can be found through the “contact us” page here:
https://www.heathrow.com/airport-gui...ow-to-get-help