Q. Rory Sutherland recently wrote about high-end takeaways (Wiki Man, 19 February). In the last London lockdown, I was fortunate to use the Supper app to try a number of gourmet takeaways from places such as Nobu, Coya Mayfair and Park Chinois, spending up to £100 per head. What surprised me, given that someone had driven halfway across town at speed to deliver the food, was that no service charge was added.