Are William Hill horse racing traders still good at Cheltenham?

I’m not sure if they still do this, but maybe five or six years ago, maybe a week or two before the festival began, Hills would give a massive price boast to a favourite at the festival for an hour or two.
I generally backed these blind even if I didn’t fancy the horse, leave it 24/48 hours and then lay it off on Betfair once the market had readjusted back to similar to what it was beforehand.
I noticed that pretty much none of these horses that they were laying at fancy prices went on to win at the festival so it was worth taking notice of these!

Have Hills still done this in recent years?