An unveiling of some of the many secrets held by Buckingham Palace, including its former rat problem, and the part it played in Charles and Diana's courtship.

Part medieval fortress, part French chateau, Balmoral is not to everyone's taste but it provides a retreat from prying eyes for the Royals. Architectural historian Jonathan Foyle casts his eye over the palace, as some of its many secrets are brought out into the light.

An unveiling of some of the many secrets, dilemmas and disasters held by Windsor Castle, including revisting the statues of Princess Diana and what really happened when Prince Harry and Meghan made their shock announcement of leaving the royal family.

Sandringham in Norfolk is one of the few royal residences owned personally by the Windsors. It was purchased in 1861 for the rakish Prince Edward, to curb his ways, but it proved to be the perfect palace for a party.

Highgrove House in Gloucester is the smallest royal residence currently in use, with nine bedrooms. It is Prince Charles's own creation and features a garden described as an 'organic oasis'.

Kensington Palace has been home to many Royals since the 17th Century. Christopher Wren expanded the former Nottingham House into a palace, which some describe as a bit of a 'botched job'.