Lift into the slow cooker. Push the onion halves into the gaps around the beef, then the potatoes, and finally fit the carrots over and around the top. Put the kettle on. Put half of the cornflour ...

Preheat the slow cooker to the lowest setting and boil the kettle. Put the chicken thighs and onions into the slow cooker with the mustard powder, stock pots, wholegrain mustard and bay leaves.

The report says they’re no different from a coffee pot or kettle that you might leave plugged in or on. The official Crock-Pot FAQ states that its slow cooker is safe to leave unattended.