Lady Elizabeth Percy , Queens train bearer , fitted for Coronation dress . Lady Elizabeth Percy , who is to be one of the train bearers in attendance on the Queen at the Coronation went to Norman Hartnell's in Bruton Street , to be fitted for her address . Lady Elizabeth is the daughter of the Duchess of Northumberland , who is a mistress of the robes and in charge of the train bearers . The train bearers dresses for the Coronation ceremony were chosen by the Queen . They are classical in design and art of white duchess satin , embroidered down the whole length of the front in polls in a wheatear design . The dresses has short sleeves . Photo shows , Lady Elizabeth Percy leaving Norman Hartnell ' s after the fitting . 13 April 1937