This week, we’re in the stunning Highlands and Islands of Scotland – a walker’s wonderland with hundreds of lochs, miles of rugged coastline and the highest mountain in Britain. Leading today’s walk is 24-year-old Daisy from Inverness, who’s a teacher by day and an army cadet trainer in her spare time. She’s given the group their marching orders - it’s a lung-busting jaunt up one of Scotland’s most iconic mountains, Stac Pollaidh. It’s less than half the size of Ben Nevis, but at 612 metres to the summit, it’s a monster climb. Will Daisy manage to march her band of merry recruits to the top, or will there be a mutiny midway? And when the scores are in at the end of the day, will she be flying high or come tumbling down?