Pre-Olympic year often has the sense of a dress rehearsal as heads are turned towards the Games looming inexorably on the horizon. But that also means as well as medals to be won there are markers to be laid down, challenges to be made and lessons to be learnt. Amongst it all there was some fantastic swimming from Britain’s swimmers, making the job of picking out the leading lights anything but straightforward. But here are the Pullbuoy swimmers for 2019.