The menu includes school staples like pasta, baked potatoes, roast dinners, fish and chips and apple crumble.

BBC: Pyworthy pupils switch to hot pub lunches

However, the biggest increase was seen with traditional meals like sausages and mash, fish and chips and roast dinners.

BBC: Sunday roast tops meal league

The thought of eating fish and chips saw saliva rise to 1, 452 milligrams but roast dinners saw saliva increase to as much as 1, 707 milligrams.

BBC: Sunday roast tops meal league

The children, aged between four and 11, go to the pub three times a week to be cooked lunch by the landlord, with the menu so far including roast dinners, pasta dishes, sausages and puddings.

BBC: Children sat at table with dinner