`  ==Question about King Carl XVI Gustaf of Sweden==  Was the marriage of Princess Sybilla of Saxe-Coburg and Gotha and Prince Gustaf Adolf, Duke of Västerbotten valid under the Royal Marriages Act ? Prince Gustaf Adolf, as a descendant of a British princess who married into a foreign family, was exempted from seeking consent to marry, but Princess Sybilla, who descended from Queen Victoria in male line, was not, unless of course she also qualifies as a ``royal princess`` in the UK, which I'm not sure she does. The question is relevant to determine whether King Carl XVI Gustaf and his children are in the line of succession to the British throne or not.  `