The Honourable Lady Ogilvy, 87, whose father is Prince George, Duke of Kent, wore an all black ensemble as she arrived for the occasion in a wheelchair.
The colourful engagement rings of the House of Windsor royalcentral.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from royalcentral.co.uk Daily Mail and Mail on Sunday newspapers.
King Charles has made no secret of his plans to make the monarchy more modern and efficient, while some members could be facing retirement due to their advanced years.