It always baffles me why BA scrimp and scrapes with stuff like this. It's not as if half the plane will need a spare set of bedding. Maybe 2/3 spare sets stored somewhere just in case. And if there is an instance where it is required, it gives the crew an opportunity to speak to and bond with the customer, apologise, maybe get the service manager to come down, perhaps offer a free beverage, G&T or something. The benefits of something like this goes a long way in improving the customer experience with minimal cost to BA. What's an extra duvet or 2 from The White Company in terms of the overall cost of 1 long haul flight! In fact, it may not be needed for several flights.

Statistics show that if you are treated well as a customer you'll tell 5 people. If you are treated badly, you'll tell 9.