Complex sentence: Avery has also completed the Patrouille des Glaciers ski mountaineering race from Zermatt to Verbier, leading the first British civilian team ever to complete the course.
Split into simpler sentences: Avery has also completed the "Patrouille des Glaciers," a ski mountaineering race from Zermatt to Verbier. He led the first British civilian team ever to complete the course.