Alan Dawson: The Man Who Gave Britain the Marilyns and Then Counted Everything Else

In the 1990s, Alan Dawson formalised the Marilyn classification—every hill with 150 metres of prominence—and then applied the same rigour to HuMPs, Tumps, and Simms. His books turned relative height into a national obsession, and he kept updating the lists until other people took over.