Apparently a growing number of airline passengers, especially the elderly, are missing their flights because of the long walk from departure lounge to boarding gate.
Most of the larger UK airports offer information about walking times either through signage or on their websites. At Heathrow some of the gates are 20-25 minutes from the departure lounge; I know I've walked it and the travelator isn't much quicker.
Unfortunately with many UK airports becoming "silent", there isn't the option to listen for an announcement. Departure boards don't have the facility to list walking times either.
