Very true. Every bride should be able to choose her dress, it is just that a venue like Westminster Abbey is quite a powerful image and so if she picks a simple dress ala the Temperley images Alixxx so kindly found, in my humble opinion, the venue and occasion will overpower the brides entrance. I think you need a statement dress for this and that doesn't mean meringue tulle and train, just something with a little more zing to it than a simple line.