Just wanted to let others know what I got this morning. Its a fold up showerproof thing that fits into its own little bag. Unlike other things that fit in bags etc this one also has a fleece it at the top so is great for days when you don't want to wear a really heavy coat/jacket. I have been looking for something like this to have in my pushchair for ages just in case I got caught in a shower as I live at the top of a hilly place so pushing a buggy and holding an umbrella is not that easy.
So for anyone else like me, check out skoody.co.uk. The website says you can also use it as a scarf etc etc, quite big like that so not so sure about that but I think its great so far.
They are very roomy. I am size 12 and got a medium, like the site said so could easily fit it over jumpers etc.