Instructions:Grab a free steak at Beefeater grills while you can. I just grabbed mine, all you do is like their page and use the time machine then they will sender you a voucher via email.
REMEMBER: Food always tastes better when it's free :)
EDIT: T&C's explain that the voucher is only valid when there is 1 paying customer present so it's basically BOGOF. Also the voucher can't be used on Saturday's ;)