With the death of William IV, and the accession to the British
throne of his niece Victoria, the crown of Hanover is automatically
separated from Britain, since the Salic Law forbids female
succession there. As a result, the Hanoverian crown passes to
Ernest Augustus, Duke of Cumberland, George III's eldest surviving
son, who rules until 1851.
Citation:
Editors. "Hanover is separated from Britain".
The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=18018, accessed 24 May 2013.]