I've been asked to lead a summer hike or two in mountains I know well (Brecon Beacons NP). I'm an experienced - mainly solo - hiker but not a qualified Mountain Leader. I'm aware I'll have to do a Risk Assessment and a Route Plan and so on. It's been suggested that the group may be up to 16 people. This seems to me a large group for a single leader. I would have thought something around 8 people or so in the group be more suitable, unless a secondary or backup leader is present. The walking/hiking experience of the members of the group won't be known by me until they all turn up, although the "severity" of the hike will be made available to them beforehand. What does the team think?