It is said that the Kingdom of England will fall if less than six ravens are kept in the Tower of London.

According to King Charles II’s infamous decree, if the birds leave the site, then its White Tower will crumble and the country will be plunged into chaos.

Now, in order to make sure "the prophecy will never come to pass" , the tower will build its own breeding aviary to ensure that the current ravens survive.

There are fears surrounding the seven ravens who live at the tower - Jubilee, Harris, Gripp, Rocky, Erin, Poppy and Merlina- as the animals breeding prospects have been cast into doubt.

Historic Royal Palaces has been granted planning permission by Tower Hamlets Council for the aviary in an effort to avert the “raven crisis” which has seen the birds numbers steadily decline in the UK.