Ben nevis 1345m

Scafell pike 978m

Snowdon 1085m

The mount cheswick green, 12m?

Contours

Contours are lines drawn on maps that show you how high/steep mountains and hills are.

The highest mountain in the UK is Ben Nevis in Scotland at 1345m. Second highest is Snowdon in Wales at 1085m and third is Scafell Pike in England at 978m