May's NHS 'Brexit dividend' claim draws scepticism and doubt

Theresa May’s promise of £400m extra in weekly NHS spending within five years has been overshadowed by scepticism among experts and her own backbenchers over her claim it can be financed through a windfall delivered by Brexit.Ahead of a major speech by the prime minister in which she will pledge a £20bn annual real-terms NHS funding increase by 2023-24, May was ridiculed for arguing that some of the money would come from a so-called Brexit dividend.What is a Brexit dividend?