Thank you for the birthday wishes folks, although at 36 I feel it's time to start commiserating rather than celebrating yet another year.
DH must have listened for once and stepped up his game. He got up with E in the night and this morning so I had a lovely lie-in, then I got up to find a big bunch of flowers from him (my 2 pairs of new sunglasses were my birthday present), a card and perfume from E and an essential oil diffuser from the dog as an apology for being so stinky.
He has also unexpectedly taken the day off work so we're going to take the stinky dog on a nice long walk in the sun this afternoon and then we're going for Dinner with the family later, so all in all i'm quite pleased. And I bought myself a gift of a litre of Baileys from Asda for £12 so I will demolish that later. 
Alex I have measured the carry bag for the cot/tent and it's approx. 40cm diameter x 8cm deep, though it will squash a bit flatter in a suitcase. Comfort-wise i think it's fine for overnight sleeping, but we had a small issue with the rustle of the tent material waking E up when she was nodding off but it was generally fine.
Ouch Hazle that sounds like a rough night.
FX for some decent weekend sleep!