A travel expert said that his perception of airline food has changed after he went behind the scenes at Turkish Airlines' factory-kitchen in Istanbul.

Nicky Kelvin, from The Points Guy website, was given a tour of the cooking and packing facilities run by Do&Co, the catering company behind Turkish Airlines' onboard food.

Fascinating footage shows him cooking business-class kebabs over a charcoal grill, assembling cheese and tomato sandwiches on a conveyor belt and arranging meals on trays, ready for distribution to passengers.