On today's Climbing Daily, we catch up with adventure climber extraordinaire Leo Houlding to find out about the trials and tribulations he faced climbing the massive 1200m vertical tower, Mirror Wall, in the polar mountains of Greenland.br br The big wall features in the award winning film 'Mirror Wall' which premiered at the recent Kendal Mountain Film Festival.br br Check out the full film herea.br br Leo Houlding Talks Polar Mountain Big Walling - Mirror Wall | Climbing Daily Ep.