VCLOTHING4150 - The design test - is the article designed for young children?: Garments which may be standard-rated irrespective of size

A wedding dress could be within the VAT Notice714 Young children's clothing and footwear size limits but, since the legal limit for marriage is 16, it would (unless it was a fancy dress costume) be ineligible for zero-rating. You will find examples of similar garments in VCLOTHING9500.