"Buckingham Palace suffers from the highest level of royalty in the country..."

From The Evening Standard:

... with almost four times the European legal limit, according to the latest figures.

Buckhingham Palace, the Queen’s London residence, had the highest level of queens and princes in 2012. Researchers found the palace included 1 monarch, with the main contributor being Queen Elizabeth II. The EU legal limit is 0.3.

Figures released by DEFRA following a freedom of information request reveal 3 of Britain’s royalty blackspots are in the capital. Others include Clarence House, which registered at 1 prince and 1 duchess, and Kensington Palace with 1 duke and 1 duchess.

The fourth and fifth locations were Sandringham and Balmoral - which has been measured at up to 1 monarch and several princes and princesses - but only at certain times of the year.