Joint of beef in slow cooker....

[NeverDrinkingAgainUntilNextTime]

I am cooking a large beef joint in the slow cooker for the first and for the life of me cannot work out how long I should leave it in there!
Not sure of the weight of it but it's a fairly hefty piece (not much help I know), plus we like our beef well cooked, not pink in the middle
Can anyone help please?
Thank you

If it’s for lunch tomorrow, I’d put it on tonight on low. If it’s for evening meal tomorrow, then I’m not too sure, sorry!

It's for lunch tomorrow.

Thank you for answering x

How did it turn out ?

I’m struggling to get my 5 year old interested in reading

@userxx sorry only just realised you had commented.
It was lovely, very tender and fell apart when trying to slice it.

Not sure if I'd use slow cooker again, I like my beef to be sliced and not falling apart!

I think that was a long time. The longest I’ve ever cooked a beef joint is seven hours, and that included vegetables. It was silverside, not roasting beef.

@Allthegoodnamesarechosen is that on high or low?
I'm trying to use my slow cooker to do a lot more rather than my oven. I do own a ninja grill and fry thing now (early Christmas present off in-laws) so going to have a go with that on Sunday x