Thanks all, I'm going to do a beef and barley soup for tomorrow night. Never cooked beef stock before but I was in Morrisons yesterday and they were selling beef bones so I thought 'why not'.
They had pork shanks as well so it's Schweinhaxe next week. Tesco don't sell many things like this except pork belly which they dress up into their Finest range!
Definitely until bedtime, I'd probably top up the water and let it carry on over night to make sure I've got every last bit of goodness from the bones!
Did you roast them first?
You paid for them???? My butcher gives me carrier bags of bones and chicken carcasses as he has to pay to have them taken away!