LWM, thanks for the Age Grading.
I've not done that since the 90s when I ran with Colchester Harriers AC,-a very supportive and encouraging club that routinely graded everyone's runs.
I regularly got 'bronzes', occasional 'silver' and a precious 'gold' (1998, MV55, 5km, 22min 30sec). I was briefly a member of a Boston club in 2003, but there was no comparison. (300+ members CHAC, 40+ B&DAC)
We keep trusting that we'll always be able to do what we did in the past, -albeit more slowly, with gradually increasing problems.
We'd accept this stoically; - my old grandad used to say "old age doesn't come by itself").
But the idea of a sudden deterioration, a major sea-change in ability is not one I like to contemplate.
Today's fab weather has been tempting me to go for a jog/plod in the evening sunshine, but Mrs.RB's hearty steak pie dinner has put paid to that, so I'm back with the diy (a wardrobe to finish), then I'll try for a short jog or a 10 mile walk on Thurs or Fri. (9 weeks to C2C)