For the first two series, the house was located in Bow, London, near the 3 Mills Studios. After planning permission expired in 2002, Newham London Borough Council ordered the complex to be returned to a natural habitat. The house has been located at Elstree Studios, Borehamwood, Hertfordshire since "Big Brother 3" in 2002. Following a break in during the second series, it was reported that security had increased to the point that the house was more secure than Buckingham Palace. The interior of the house has changed each year, reflecting a certain theme or twist in the game. The fifth series, which featured stricter rules and consequences, featured a harsh colour scheme and a claustrophobic setting. The third series featured a "Rich and Poor" twist, thus a row of bars was placed in the centre of the house to divide the housemates. The diary room features a different design each year, and is frequently the last room of the house to be revealed to the public. Each series has featured a garden in the house, which has included outdoor furniture, a jacuzzi, and on some occasions other luxuries. The eighth series featured an "inside out" theme for the house, thus items such as the refrigerator were located in the garden.