The couple's relationship was exposed in 2005 when they were photographed together on the Swiss ski slopes of Klosters.
这对情侣的恋情在2005年被曝光，当时他们被拍到同在瑞士克罗斯·特斯滑雪场。
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Once into Switzerland we were met by Dominic Clancy from the Swiss MGA Car Club and as he led us through Dorf, Klosters and Landquart to our destination at Chur.
Sissons' gaffe is not the first time the BBC has come under fire from the royals, with Prince Charles famously caught slating Witchell during a press-call at the ski resort of Klosters in 2005.