OK, so the swim was just 12 miles and it took them four-and-a-half hours--a marathon swim, but not the longest ever completed. The funny part is the quote that the BBC chose to highlight in this article: Walliams completes swim to Africa

"Swimming and throwing up... it shouldn't really go together."

I remember thinking the same thing after some particularly grueling sets of 100's in high school and college. Words to live by!