When do beneficiaries require copy of will?

Old-Ben_2

Evenin all,

Friend has asked me if I knew, but I'm not sure. - background - friend's mother sadly died recently leaving friend as executor and main beneficiary. friend's siblings are left token gift in will but f worried they'll start all sorts of hassle etc when they see will. Funeral is thursday this week, f expects probate to be granted towards end of july, does f need to let them know before probate granted?
More importantly does f need to let them see will before funeral?

Any advice welcomed, especially if there is a legal requirement.

Thanks

Ben