Riba Stirling Prize 2013: Astley Castle wins architecture award

The 2013 Riba Stirling Prize for architecture has been won by a groundbreaking modern holiday home inserted into the walls of an ancient castle.

Astley Castle was chosen from six buildings on a diverse shortlist to win the annual award, which is the Royal Institute of British Architects' highest accolade.

Once home to the aristocratic Grey family, Astley Castle has links to three queens of England and gained Grade II listed status in 1951.

The BBC's Will Gompertz reports.