Help me find a dress today please

[MozzchopsThirty]

I need a dress that is suitable for farewell drinks in 30 degree heat that I can warm up for arriving at Heathrow in probably zero degrees

For the way out I'm wearing a shirt dress from top shop which I'm wearing with tights and boots to airport and will then just change I to flip flops when we arrive

I bought another shirt dress from jack wills but it's hideous and makes me look like a bag of shit

I live in a city so most shops are accessible today
I'm a size 10

TIA

Bump

What about a summer wrap dress in cotton then take long sleeved top and long jumper to put with it and your boots and tights for journey back