With so much of the UK with living with unspecified malaise, some significant part of which likely contributing to their low employment participation rate, I suspect giving everyone vitamin D would be very cost effective.
https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessiona...
The exception is "Chinese takeaway", which is actually as bad as the stereotype.
Anecdotally, by far the worst home cooking I’ve had was at the hands of a British couple; tasted like simmered dish water.
https://www.orwellfoundation.com/the-orwell-foundation/orwel...
The thing I find odd about British restaurants is that all the Japanese chains (Wagamama, Itsu) have names that are so dumb it's like they're actively trying to be offensive.