Belfast (meaning: "mouth of the sandbanks") is the capital and largest city of Northern Ireland, the second-largest city in Ireland after Dublin, and is situated around the River Lagan, which runs through the city. It is a port city known as the birthplace of the RMS Titanic, and for its political murals, documenting the ‘Troubles’ of the 20th century. Today, Belfast remains a centre for industry, as well as the arts, higher education, business, and law, and is the economic engine of Northern Ireland. The city suffered greatly during the period of conflict called "the Troubles", but latterly has undergone a sustained period of calm, free from the intense political violence of former years, and substantial economic and commercial growth. Additionally, Belfast city centre has undergone considerable expansion and regeneration in recent years, notably around Victoria Square.

Liverpool is an important city of Merseyside, England. It was founded as a borough in 1207 and was granted city status in 1880. It is a major city famed for culture, football teams, The Beatles and buzzing nightlife. It lies within the historic county boundaries of Lancashire. It is also a large, vibrant city with great cultural heritage and was awarded the title of European Capital of Culture 2008, with the famous Pier Head Waterfront being a UNESCO World Heritage site since 2004.

Southampton is the largest city in the county of Hampshire on the south coast of England, and is situated 120 kilometres (75 mi) south-west of London and 30 kilometres (19 mi) north-west of Portsmouth. Southampton is a major port and the closest city to the New Forest. It lies at the northernmost point of Southampton Water at the confluence of the River Test and River Itchen, with the River Hamble joining to the south of the urban area. The local authority is Southampton City Council, which is a unitary authority. Just over a quarter of the jobs available in the city are in the health and education sector. A further 19 per cent are property and other business and the third largest sector is wholesale and retail, which accounts for 16.2 percent. Between 1995 and 2004, the number of jobs in Southampton has increased by 18.5 per cent. Southampton has always been a port, and the docks have long been a major employer in the city. In particular, it is a port for cruise ships; its heyday was the first half of the 20th century, and in particular the inter-war years, when it handled almost half the passenger traffic of the UK. Today it remains home to luxury cruise ships, as well as being the largest freight port on the Channel coast and fourth largest UK port by tonnage, with several container terminals. Unlike some other ports, such as Liverpool, London, and Bristol, where industry and docks have largely moved out of the city centres leaving room for redevelopment, Southampton retains much of its inner-city industry.

Reykjavík is the capital and largest city of Iceland. It has a latitude of 64°08' N, making it the world's northernmost capital of a sovereign state, and is a popular tourist destination. It is the heart of Icelands's cultural, economic and governmental activity. The city itself is spread out, with sprawling suburbs. The city centre, however, is a very small area characterized by eclectic and colourful houses, with good shopping, dining, and drinking.

Plymouth is a city and unitary authority area on the coast of Devon, England, about 190 miles (310 km) south-west of London. It is built between the mouths of the rivers Plym to the east and Tamar to the west, where they join Plymouth Sound. Since 1967 the City of Plymouth has included the suburbs of Plympton and Plymstock, which are on the east side of the River Plym.