Dr Owen Jeffries spoke to a BBC reporter along with Professor Ron Maughan (St Andrews University) Dr Sophie Killer (Performance nutrition consultant), Dr Gabriella Montenegro (CeSSIAM) about the best way to rehydrate on a hot day.
You can read the full article here: https://www.bbc.com/future/article/20210802-is-water-always-the-best-choice-on-a-hot-day