of national obesity forum, tam fry and professor of exercise and obesity at leeds, leeds beckett university, paulone at a time, tam fry. first. would it really make any difference to put health warnings on junk food? and what isjunk warnings on junk food? and what is junk food? >> well, we have to find. well, the first junk food is the ultra processed food, which has got very high levels of sugar and fat and salt. the second thing is that we don't know if it's really going to work in the uk, until we have it, but the evidence shows certainly in central and latin america, in roughly 15 countries, that it has been implemented since the 2016 and that it is having an effect. >> well, there you go, paul. that makes it pretty clear cut, doesn't it? we've got a big problem. nothing seems to be working. but this has worked in other countries, so why not? >> absolutely. i think that we. i'm sorry. sorry, tam. >> let paul answer that one. >> let paul answer that one. >> i never do . >> i never do. >> thanks, tam , always good to >> thanks, tam, always good to join the stage with you, yeah, well , join the