Let me put in some words of praise for the assistance at both Stansted and Luton.
Wife needs assistance to get through airports as arthritis makes walking difficult, painful and slow. Have used both the above airports quite often in recent years to a variety of destinations and have found the service to work well.
Staff at both locations have been pleasant and efficient.
These forums are more often used for hurling brickbats but thought praise should be recorded when deserved.
Must admit that we have not utilised these services at Heathrow, because I avoid the place if at all possible. Horrible airport in most respects.