Delegation of the European Union to the United Kingdom

Mulberry House, Number 36, Smith Square, is located in the City of Westminster, London. It was built in 1911 as a private house for Reginald McKenna, a politician and later Chairman of the Midland Bank. The architect was Edwin Lutyens. In 1930 the house was bought by Henry Mond, 2nd Baron Melchett. In conjunction with his wife, Gwen, Melchett employed the architect Darcy Braddell to undertake a major internal remodeling and redecoration. Braddell engaged a number of painters and sculptors, including Charles Sargeant Jagger to create what has been described as "one of the most important Art Deco interiors in London." After a period of institutional use in the post-war period, the house was reconverted to a private residence in the early 21st century.

St John's Smith Square is a redundant church in the centre of Smith Square, Westminster, London. Sold to a charitable trust as a ruin following firebombing in the Second World War, it was restored as a concert hall. This Grade I listed church was designed by Thomas Archer and was completed in 1728 as one of the so-called Fifty New Churches. It is regarded as one of the finest works of English Baroque architecture, and features four corner towers and monumental broken pediments. It is often referred to as 'Queen Anne's Footstool' because as legend has it, when Archer was designing the church he asked the Queen what she wanted it to look like. She kicked over her footstool and said 'Like that!', giving rise to the building's four corner towers.

Transport House was the headquarters of the Transport and General Workers' Union (T&G), and also originally of the Labour Party, the Trades Union Congress, and the Workers' Travel Association. The term "Transport House" was once a metonym for both Labour Party Headquarters and the T&G. The building located on Smith Square and Dean Bradley Street, London, England was actually owned by the T&G and officially opened in May 1928. The T&G started to occupy it from 1926, moving from their first headquarters in Matthew Parker Street. The TUC moved out to Congress House between 1956 and 1958. The Labour Party moved out in 1980, transferring its headquarters to what later became known as John Smith House. The T&G remained until the 1990s, when they moved to a modern building on Theobalds Road, Holborn, which is now also known as Transport House. The original building is now called Local Government House and houses the headquarters of the Local Government Association and a conference centre. The local headquarters of the T&G in a number of other cities were also called Transport House.

Smith Square is a square in Westminster, London, 250 metres south-southwest of the Palace of Westminster. Most of its garden interior is filled by St John's, Smith Square, a Baroque surplus church, which has inside converted to a concert hall. Most adjoining buildings (thus sharing its address) are offices, with the focus on organisations lobbying or serving the government. In the mid-20th century, the square hosted the headquarters of the two largest parties of British politics, and it is now hosts much of the Department for Environment, Food and Rural Affairs and the Local Government Association. It has a pedestrian or mixed approach to the four sides and another approach to the north.

The Centre for Policy Studies (CPS) is a think tank and pressure group in the United Kingdom. Its goal is to promote coherent and practical policies based on its founding principles of: free markets, "small state," low tax, national independence, self determination and responsibility. While being independent, the centre has historical links to the Conservative Party. It was co-founded by Sir Keith Joseph, Alfred Sherman and Margaret Thatcher in 1974 to challenge the post war consensus of Keynesianism, and to champion economic liberalism in Britain. With this in mind Keith Joseph originally wanted the think tank to study the social market economy, naming it the 'Ludwig Erhard Foundation' and 'Institute for a social market economy' until it was eventually settled on the benign 'Centre for Policy Studies'.The centre has since played a global role in the dissemination of free market economics alongside policy proposals claimed to be on the basis of responsibility and individual choice. It also asserts that it prioritises the concepts of duty, family, liberty, and the rule of law. The CPS states that it has a goal of serving as "the champion of the small state."

Lord North Street in central London is a short street dating from 1722 of Georgian terraced housing running between Smith Square and Great Peter Street in Westminster, the political heartland of British government. As such the properties have always commanded high fees and featured in many dramatic storylines.Past residents include the socialite Sibyl Colefax, founder of the Colefax and Fowler fabrics and wallpaper company, and Harold Wilson, twice Prime Minister who in November 1974 alleged that renegade MI5 operatives had broken into his home.More recent residents include Jonathan Aitken and Theresa Gorman.

55 Tufton Street is a four storey Georgian era townhouse on Tufton Street, in Westminster, London, owned by businessman Richard Smith. Since the 2010s the building has hosted lobby groups and think tanks related to Brexit and climate change. A group of these think tanks, dubbed "The Nine Entities", use the building for biweekly meetings to coordinate policy and public messages.The nine lobby groups—the TaxPayers’ Alliance, the office of Peter Whittle (the former deputy leader of UKIP), Civitas, the Adam Smith Institute, Leave Means Leave, the Global Warming Policy Foundation, Brexit Central, the Centre for Policy Studies and the Institute for Economic Affairs—were accused by former Vote Leave employee Shahmir Sanni of using the meetings to "agree on a single set of right-wing talking points" and "securing more exposure to the public".The organisations it houses have close connections with those at nextdoor 57 Tufton Street, including the Centre for Policy Studies and CapX.

Tufton Street is a road in Westminster, London, located just outside of the Westminster Abbey precinct.

The European Foundation is a leading Eurosceptic think tank based in the United Kingdom, founded in 1992. It is chaired by Bill Cash, a British Conservative MP. The organisation produces the European Journal. The Great College Street Group was formed in October 1992 in order to oppose the Maastricht Treaty. The Group, consisting of politicians, academics, businessmen, lawyers, and economists, provided comprehensive briefs in the campaign to win the arguments both in Parliament and in the country. The European Foundation was created out of Great College Street by Bill Cash after the Maastricht debates. It exists to conduct a vigorous campaign in the UK to leave the European Union. The Foundation continues to establish links with like-minded organisations across Europe and the world. It was reported in 1996 that the European Foundation was being funded by Sir James Goldsmith the then leader of the British Referendum Party. Because there was an approaching election at which Conservative and Referendum candidates would be contesting the same seats, Cash was forced to sever the link. The shortfall in funding was plugged by Margaret Thatcher, who later became the European Foundation's Patron, a position she held until her death.

Westminster Hospital was a hospital in London, England, founded in 1719. In 1834 a medical school attached to the hospital was formally founded. In 1939 a newly built hospital and medical school opened in Horseferry Road, Westminster. In 1994 the hospital closed, and its resources were moved to the new Chelsea and Westminster Hospital at the old St Stephen's Hospital site in Fulham Road.

The City of Westminster Magistrates' Court was a magistrates' court located at 70 Horseferry Road, in the City of Westminster, London. It was originally called Horseferry Road Magistrates' Court, after the road in which it was sited. However, it was renamed in July 2006 following the closure of Bow Street Magistrates' Court. It served as the court where the Chief Magistrate of England and Wales sat, and all extradition and terrorism-related cases passed through the court. The court closed permanently on 22 September 2011, and was replaced on 27 September 2011 with Westminster Magistrates' Court, built on the site of Marylebone Magistrates' Court at 181 Marylebone Road. The court pictured has since been demolished, and replaced with a development of flats.

Marsham Street is a street in the City of Westminster in London, England. It is approximately one mile in length and runs south from Great Peter Street near Victoria Street and Parliament Square.