James
Sounds ok, Italy can be as high as 34celsius and that will bring H into play and push S out.
Just have to wait around for someone with 26c or 27c telling S was too hot to work with and M was better. :)
Had 27C in Italy earlier this season (100% race)
Overheating Soft is around 2 secs faster than a Medium (PL1 - PL2,PL3), across a 15 lap stint.
And that's with Soft tyres getting well into the red...about 50% of the way from full red in the tyre temp guage.