20 years uni reunion in the autumn...posh russel group collegiate one I that makes a difference. Need a black tie dress and having young kids haven't needed one for years. Any ideas? am 5 foot 9 and a size 12, slim arms, legs and shoulders but a mum tum! Budget £100 but flexible for the right thing as have a potential other event I could wear it for. Am also really pale and freckly so pastels and yellow are a no go!