Hello all - cannot believe a thread I started made a discussion of the day, I clearly underestimated how much we all like talking about the weather 
Oh dear, today did not go well at all, but I'm now lying in front of fan at home, covered in wet towel, which is total bliss.
I went in obsessively well-prepared: loose clothes; sun hat; little cooler with two frozen water bottles and an ice pack, spray bottle, and damp cloth for neck. At first I was very calm, I thought maybe I'd finally cracked it and I actually had a lovely empowering moment where I thought "this is nice, I can do this. It's nice to be warm."
Then my stomach lurched and I started feeling dizzy ... ignored it for ages and then the nausea started. Ignored it again, then it got all much worse, and I almost fainted. Had to leave early. I'm really cross and disappointed in myself, and exhausted.
It only got better after a lot of rest indoors and cooling right down again. If anyone's reading this and can tell me why my body does this I'd be genuinely grateful for the cure.
Delatron, it's a little bit like waving a big feast in front of someone who's starving but allergic to it all, and then taunting them for not enjoying it. It just feels a bit unfair! But please do enjoy the feast while it's on offer, none of us mind, we just can't join in 
Anyway, hope everyone's ok, 
and 
all round to anyone else feeling awful. We'll all get some sleep tomorrow night hopefully which will help.