how much beef

[farrowandballs]

should I buy for 3 adults and 2 kids to eat as a roast dinner? I've just turned meaty after 20 years of being a veggy. I really want to cook my friend a roast dinner as she's coming to England for a holiday after living abroad for 4 years. So I need advice on 1) what cut of beef should I buy? 2) how much will we need in weight?; and 3) how much should I expect to pay?
I will be buying from a butchers.
Thank you in advance

[Geordieminx]

Topside is my personal fav.

No idea of weight but if I was buying from tesco would expect to pay £10-£12 to feed 3 adults and 2 kids, maybe a bit more?

[farrowandballs]

yikes! thanks!