Pseudo lager yeast

[Paulus]

Hi all,
I've had a few problems with stuck fermentations using kits and I believe it is because of my keeping the yeast attached to the kit in the house until I ferment it.
I live in a hot climate (40C) in summer so the fault is mine. I have 2 kits left, a Cooper's Mexican and a Muntons Bock.
These ferment at about 20C so I would like to use a reliable yeast for what is essentially a pseudo lager.
Any suggestions?
Thanks,

 

[Clint]

Thd stuck fermentation has also been down to not pitching enough yeast.
Nottingham at the low end of its range should be OK but at 20 I don't know ...
Wonder if any of the kviek style yeasts would suit?