One of Scotland’s Munros has been demoted, taking the total number of the highest hills in the country from 284 to 283.

Sgurr Nan Ceannaichean will henceforth be classified as a Corbett by the Munro Society, who announced the change at a press conference earlier today.

The mountain, between Glen Cannich and Glen Carron, is now officially listed at 913.43, just under the magic 914.4m (3000ft) mark.

Three other hills in question have had their official height changed but remain in their groups. Beinn Teallach in Glen Spean maintained its status despite having 40cm taken off its peak, to 914.6m, while Ben Vane’s reading rises from 915m to 915.76m.

One of the highest Corbetts, Sgurr a’ Choire-bheithe, has had 32cm added to now total 913.32m, but remains in the second grouping.

The change takes the official number of Munros on the list from 284 to 283, and conversely makes the Corbett count rise from 219 to 220.

A mountain must be reach 914.4m (3000ft) to attain Munro status. The name comes from Sir Hugh Munro who produced the first comprehensive list in 1891. The next grouping is named after John Rooke Corbett, who completed his own list in the 20s.