SO, eventually I decided to go as Angelina Jolie. Which basically meant I would be dressed as Tomb Raider. At the time it seemed like a really simple fancy dress, but then I got carried away and bought a lot of things ( I managed to sell a few things on ebay so I didn't feel that bad spending).
I bought brown pants (trousers) from Primark and cut them up, two blue guns from a poundshop which I then sprayed black, two black grenades which I sprayed silver and finally a brown bag. For some weird reason I already had a mint vest? I then made gunholsters from leather material and attached it to my belt.
Based on this image

I don't think it turned out that bad, except I forgot I no longer had dark brown hair.

