Wednesday 28 October
7.30-8.00pm BBC ONE
Jimmy Doherty attempts to unravel the scientific secrets behind homemade sandwiches

Jimmy Doherty attempts to unravel the
scientific secrets behind homemade sandwiches

Jimmy Doherty’s mission to unravel the scientific secrets behind mass food production continues with an investigation into the contents of homemade sandwiches.

Why does supermarket bread stay soft longer than home-baked bread? Jimmy attempts to recreate some “supermarket bread”, building his own factory mixer from a metal dustbin. He also wonders what it is about processed cheese slices that people love so much – after all, they’re only 60 per cent cheese. Could it simply be that they’re sliced-bread shaped? Back in the barn, Jimmy sets up his own processed-cheese production line to find out what the other ingredients are.

Bugs and caterpillars are rarely found in ready-bagged supermarket salad leaves so Jimmy investigates how one Wiltshire producer checks that 1.5 million bags a week are bug-free.

He is also keen to discover how supermarket suppliers grow tomatoes out of season and wonders whether they are doing anything to the fruit to be concerned about. He visits a tomato farm in Hertfordshire, where he discovers that it’s not greenhouses alone that help their tomatoes grow.

Jimmy’s Food Factory is simulcast on the BBC HD channel – the BBC’s High Definition channel, available through Freesat, Sky and Virgin Media.