For general info, since there’s some confusion above, here’s a run-down of UK mountain qualifications:
Walking Group Leader (WGL): Day walks in non-remote UK terrain in summer conditions
Single Pitch Award (SPA): Single-pitch summer climbing, not including lead-climbing.
Summer Mountain Leader (ML): Day walks and multi-day expeditions in the UK mountains in summer conditions (i.e. anything other than snow/ice sufficient to impede progress).
Winter Mountain Leader (WML): Day walks and multi-day expeditions in the UK mountains in winter conditions, including use of ice-axe and crampons for walking.
Mountaineering Instructor Award (MIA): As summer mountain leader, plus UK summer rock climbing, including leading.
Mountaineering Instructor Certificate (MIC): As MIA, plus UK winter climbing/mountaineering.
International Mountain Leader (IML): Summer & Winter walking (single and multi-day), throughout the world. Winter walking is aimed at snowshoeing rather than axe/crampons. Various add-ons exist for Mountain biking, canyoning, artic/desert/jungle travel, etc.
British Mountain Guide (BMG): Summer and winter walking, climbing and skiing throughout the world, including travel on glaciers.