You do not need a licence in the UK there is no such thing for premises not serving alcohol. You will need a current Food Safety/Hygiene certificate and your premises will need to be inspected by the Environmental Health Department before you open. You will also need public liability Insurance etc etc.
Yes you do!You will do for opening a business!And also so people know the restaurant is hygienic!
yes it is safer to do so as u might get into some sort of trouble.