The well known secret, Sophie Cranston, who previously worked at Belville Sassoon, then later with Alice Temperley, (Alice is I am told dressing the Mother and Sister Phillipa, who is to be Maid of Honour ). Sophie's brand Libelula,was reported to be designing the dress, but as there will be apparently three different dresses according to gossip, noone can be completely sure. However Sophie does make high waisted dresses that Catherine like's to wear, and they definitely would suit her.
In any case last week when I was in London, I heard the dress was being made in the Palace in order that the secret should be kept that way. Then Olivier Theyskens is reported to know who the designer is, and then nearly gave the secret away. Just him saying this, narrows down the possible designers.
Then I have also heard that Bruce Oldfield was to design the dress, who was a favourite designer of Princess Diana. In England he designs the most incredible dresses for the rich and Aristocratic, beautifully elegant dresses in sharp shapes. They so suited the late Princess, who was tall and Amazonian in comparison to Miss Middleton who is very petite.
Tonight at dinner I was told it was definitely Alexander Mcqueen's assistant who is now Creative Director. Sarah Burton, who is so talented and should in my opinion make it. However, I appreciate that Catherine has a different style and may favour something more traditional. This would be the designer I would use, or Vivienne Westwood,