In reply to Nbrain:
> If you're intending to go for a walk and there is some low angle slopes with patches of snow then that's totally within remit of summer ML!
That's a different scenario to looking up at a peak with snow from say 700m, and thinking, "well I don't reckon we'll need crampons, so it will be alright"
Encountering snow patches on the ground is very different from knowingly leading your group onto snow covered terrain. My initial response to the OP was in regard to the conditions prevalent in Scotland/The Lakes now, would you say these conditions are within ML(S) remit?
Again from the MTA :
"The term 'summer' is used to describe any conditions not covered by winter. Winter can be defined as the time when snow and ice prevail or are forecast. Neither term can be defined by a portion of the year."
Snow patches are not equivalent to prevailing(i.e. winter) conditions.
Ultimately it is down to semantics, and up to each ML to make their own decisions. If you have any links to sources that are unambiguous and can indicate conditions where a Summer ML is within remit taking groups out in similar conditions to those in the highlands/Lakes now, then I would be interested to read them.