Clubs and pubs in North Somerset are being told the sale of Nitrous Oxide is no laughing matter.

N-2-Oh, better known as Laughing Gas or Nos, has become popular as a so-called legal high, with reports of a premises in Weston selling it at 'one pound a shot'.

But it's illegal to sell it for that purpose, and the council have warned it can be dangerous, as it restricts a person's oxygen supply and damage the nervous system, and its effects can be even worse when mixed with alcohol.