My great aunt and uncle (85 and 90, Enfield) had it in the first week of delivery. Was actually pretty impressed they went for it, seeing as they can be a bit weird/superstitious about "new" things and have in the past turned down the flu jab (on the rock-solid basis of "well, you just never know").
Also a mate of mine (early 30s) who works in a hospital - she's not actually clinical staff, but apparently some codger had refused their dose and it was a case of either someone takes in in the next few hours or it goes in the bin.