Hi i'm only on my second brew but I've done a woodfordes wherry as my first and that Brewed fine at probably an average of 21-22degC.
i didn't do anything to my yeast for either the wherry or my great eastern that is in the FV now (both kit yeasts). I just aerated, pitched it in and gave it a stir, then covered it and left it. When the wherry stopped bubbling i gave it a very gentle swirl by rotating the fv left and right so's not to get any air into it, then off it went bubbling away again for a couple more days.
I'm not sure it would have long enough it the sugar solution for you to be able to tell. I kept after reading this forum a spare pack of safeale (although it is 05 not 04 as they had sold out) yeast in my fridge just incase.
My second brew so far is no where as lively as my first so i might get some yeast vit tomorrow just incase it grind to a hault.
You would probably be better served with a reply from someone with alot more experience than me (not to mention I added too much water to my first brew)
But I hope my experience helps!