By Elisabeth Mahy Wake Up to Money, BBC Radio 5 Live image sourceCarol Deeney image captionCafe owner Carol Deeney says 50% of sales are now via delivery app If any of Carol Deeney's customers fancy a bacon roll or a haggis toastie, they can pop down to her Scottish Street Food café in east London. But she says half of them, these days, turn to delivery apps instead. "We have loyal customers now that haven't even graced our doors," she says.