Amateur surveyors just reclassified a hill as a mountain by finding it’s true height was over the 2000 ft limit for the new name– but only by half-a-foot.
“It’s fantastic. Nothing like this had happened before,” said Mr Phillips, from Welshpool, Powys. “We’re very pleased our survey has proved Mynydd Graig Goch is a mountain and not a hill.” (BBC story)
Hate to ruin their fun, but the margin of error was reported to be 9.8 ft, which is within the bounds of the previous measure. I think even Nevile Maskelyne cound have done that.