Since winning the world title in 2001, Britain’s 4x200m freestyle relay team has been seen as one of the national team’s greatest strengths, but is it as strong as we think? And can it challenge in Shanghai?

Selection policies are funny things. The obvious course of action seems to be to pick the fastest swimmers and be done with it, but often federations like to impose a variety of additional criteria, and then in the case of recent events in Australia, not even stick to them.