I have a wedding this Saturday and all my appropriate outfits are polyester and a bit sweaty, and the forecast is 25 degrees. Can anyone recommend a dress? Looking for something colourful, ideally linen or cotton, midi length or maxi if it's not too bridesmaidy. Size 8/10, reasonable figure but I'm on an all-inclusive holiday right now so have gained about a stone in the past week. Budget less than £100 if possible. Thanks in advance!