With feet in the sea and head in the clouds, some of Britain’s finest mountains rise offshore – as we discover on the ISLE OF MULL .

Mull isn’t the only place where seato-summit peaks reign supreme…

■ Distance: 10¼ miles/16.4km ■ Time: 8 hours ...

MOUNTAIN RIDGE WALKING In association with DIFFICULTY HARD ...

Bla Bheinn seen through the mist from ...

■ Distance: 3½ miles/5.5km ■ Time: 7 ...