For her wedding yesterday Princess Alexandra chose a dress of great simplicity, designed by John Cavanagh in lines which echoed the fan vaulting of the abbey setting.

It was a supremely traditional dress, and yet she broke away from tradition in that its fine cotton lace was faintly tinted with magnolia instead of the customary pure white. The bodice of the dress was close fitting and simple, with a high round neckline and full-length sleeves, and flowed in an unbroken line into a skirt straight and smooth in front; sweeping to fullness at the back with a long train.

The lace, in an acorn and oak leaf design, was over an identical dress of white tulle embroidered with small gold pailettes which glinted softly through the lace as the Princess moved. On her head glittered the diamond fringe tiara that had been worn by her mother, Princess Marina, at her wedding in 1934. It sat straight on her dark hair, which was waved softly over the temples, and it held in place her heavy veil.

From

http://www.timesonline.co.uk/tol/life_and_style/court_and_social/article3807825.ece