Driveways usually sink because they haven’t been laid properly. They may not have been dug deep enough, or the installer might not have used the right materials. This will need to be corrected at the earliest opportunity, although in extreme cases, the driveway may need to be completly be relaid.
Kensington and Chelsea
The Royal Borough of Kensington and Chelsea is an inner London borough of Royal borough status, towards the west of the centre. The borough was formed in 1965 from the former boroughs of Kensington and Chelsea. Kensington's Royal Borough status was inherited by the new borough. It covers an area of 4.68 square miles. As the smallest borough in London as well as the second smallest district in England, this urban area is among the most densely populated inside the United Kingdom.
According to estimates from the middle of 2014, the borough has a permanent population of about 156190 inhabitants.
The borough is immediately to the west of the City of Westminster and to the east of the London Borough of Hammersmith and Fulham. It consists of key museums and universities in Albertopolis, department stores like Harrods, Peter Jones and Harvey Nichols, and embassies in Belgravia, Knightsbridge and Kensington Gardens. It's home to the Notting Hill Carnival, Europe's largest. It consists of lots of the most highly-priced residential districts in London and even in the world, as well as districts with high levels of social housing and poverty. The local authority is Kensington and Chelsea London Borough Council. The borough's motto is Quam Bonum in Unum Habitare, which may be roughly translated as 'How good to dwell in unity'.