Lady Gabriella Windsor was seen attending Trooping the Colour today, marking her first public appearance since the tragic passing of her husband.The Royal Family was deeply saddened by the loss of Thomas Kingston, who passed away at his family's £3million Gloucestershire mansion in February, with authorities stating there were "no suspicious circumstances." An inquest revealed that Mr Kingston suffered a fatal gunshot wound to the head on 25 February, at the age of 45.Thomas Kingston, a former hostage negotiator and financier, was the son of Martin and Jill Kingston, who have owned the grand mansion since 1996. A spokesperson for the Gloucester Ambulance Service confirmed their attendance at a private residence in the Cirencester area, saying: "Gloucester Police have confirmed an ambulance from Gloucester Ambulance Service attended a private residence." Following her husband's death, Lady Gabriella, daughter of Prince and Princess Michael of Kent, has reportedly moved into Kensington Palace, not wishing to stay alone in the house they once shared, reports the Mirror.