Share Radio's technology editor Steve Caplin looks at IT problems at Walker's crisps and how supermarkets are trying to hide empty shelves from shoppers. Heinz have apparently worked out how to produce tomatoes on Mars, Twitter is allowing people to edit tweets (at a price) and Curry's has teamed up with Uber for quick home deliveries. If you've a bored dog, then DogTV is here, aimed at the canine viewer, while lab-grown fish could soon be on the menu. And as COP26 draws to a close, there's news of how to power planes with ammonia, how to clean up the oceans in a more sustainable way and how to remove soot particles from wood fires.