My mother and father joined us for a few days in Germany last October.
Having recently fallen, my mum was not walking so well, but managed to get on the FlyBe aircraft at BHX. On arrival at Dusseldorf we were awaiting their arrival at the alloted door, but were concerned that they were not coming through.
A scout around the land side area at arrivals saw my parents coming out of a different door, mum in wheelchair being pushed by a member of the airport staff. I was all for getting the car out of carpark 7 and bringing it to the pick-up area outside arrivals, but the staff member would have none of it. He cheerfully pushed her all the way to the car, helped her out of the chair and into the car, and seemed amazed I offered him a tip as thanks for what I consider to be going much further than the "extra mile" (literally and figuratively) to look after my mum.
I cannot imagine a similar level of (free) service at UK airports today.