One of the best known franchises is the McDonald's chain of hamburger restaurants.

ECONOMIST: Idea

Many restaurants currently post nutritional information in a hallway, on a hamburger wrapper or on their website.

WSJ: FDA head says menu labeling 'thorny' issue

Although the safety of food served in restaurants falls outside the HSE's remit, the case of an establishment which refused to serve a hamburger rare was cited by the HSE as one of a number of "crackpot cases".

BBC: Health and Safety Executive reveals 'scores of bogus bans'