The body of water that is southwest of the UK is the Irish Sea.
Manchester South West - UK Parliament constituency - ended in 1918.
South West Hertfordshire - UK Parliament constituency - was created in 1950.
Islington South West - UK Parliament constituency - ended in 1974.
South West Norfolk - UK Parliament constituency - was created in 1885.
South West Lancashire - UK Parliament constituency - was created in 1868.
South West Lancashire - UK Parliament constituency - ended in 1885.
Edinburgh South West - UK Parliament constituency - was created in 2005.
South West Devon - UK Parliament constituency - was created in 1997.
South West Staffordshire - UK Parliament constituency - was created in 1974.
South West Wiltshire - UK Parliament constituency - was created in 2010.
South West Staffordshire - UK Parliament constituency - ended in 1983.
Manchester South West - UK Parliament constituency - was created in 1885.