MattH & son on the Kennet Valley 100, plus Ladyvet (though I don't know which of the women I don't know who was in the hall at the end she was), PAC & Bikey Mikey (though I don't know which was which).
Plus, no doubt, others, all unknowing.
[Edit]Having seen Bikey Mikey's photo, I now know which was which. I definitely spotted him. Beard & hair.
And thanks to posts from ChrisJ & Ladyvet, I can add him to the list, & know who she was. I rode with ChrisJ to the start, after a chance meeting in South Reading, & saw Ladyvet on the road & at the end.