WH took a 20p rule 4 on that, despite me putting my bet on at 16.38

On what?

My thought too NG.

I presume he's means the 5.00? But Buick's horse would've still been a runner at 4.38pm?

Why don't we get a clue in some of these threads instead of them being so cryptic?

That is definitely not right. I am off too to collect mine and will complain if they do that to me

they corrected it, 5.00, changed to 10p

I'm shocked  someone can get a bet on with William Hill.