First of all, is it 'ok' to wear a smartish/tailored jacket undone with straight leg jeans and a vest top? I have no idea what is fashionable or looks good, I am 35 if that helps.
Then secondly, assuming the first is ok, does this ever work with huge norks? I tried a jacket on in Next the other day, but it just looked silly as my boobs just sort of stuck out the front. 
Finally, where can I find a decent/nice jacket?