Central London
From Tardis Wiki, the free Doctor Who reference
Central London was the city centre of London adjacent to East London. (TV: The Caretaker) It included at least part of Westminster. (TV: Aliens of London)
In 2005, all of Central London was closed off following the destruction of Henrik's. (TV: Rose)
In 2006, a Slitheen craft crashed into Big Ben before landing in the River Thames in Central London. (TV: Aliens of London)
London was gridlocked at its city centre when the 456 arrived in 2009. (TV: Children of Earth: Day Three, Children of Earth: Day Four)