So. I actually bought a ball dress for £10 in Debenhams, it fits really nicely, and was reduced from £60! It is suitable for weddings as well and I am going to one this summer so...
Thanks for the kind offers of loans, but I can afford £10 and the dress is gorgeous 
It looks pretty much like this.
\link{http://www.bridesave.com/search/index.cfm?action=details&product_id=13960\dress} but its actually lilac, and the ribbon around the waist is lilac too.
Am having my hair like \link{http://www.movingmakeup.co.uk/images/jeanhair.jpg\this}
What to wear with it; shoes, jewellery, bag, wrap/shawl? It was dead cold last year so I need something to keep me warm any ideas?
TIA!