today that, well, professor chris whitty today pointed out that if vaccines turn out today pointed out that if vaccines turn out to today pointed out that if vaccines turn out to be less effective than hoped turn out to be less effective than hoped against omicron, that would be what he hoped against omicron, that would be what he called a material change and ministers what he called a material change and ministers would have to decide then if they ministers would have to decide then if they want to intervene further. in if they want to intervene further. in other if they want to intervene further. in other words, more if they want to intervene further. in otherwords, more measures. chris whitty in otherwords, more measures. chris whitty got in otherwords, more measures. chris whitty got a in otherwords, more measures. chris whitty got a verbal kicking from some whitty got a verbal kicking from some conservative mps in the commons for his some conservative mps in th