A number of UK cities are known for their music. Acts from Liverpool have had 54 UK chart number 1 hit singles, more per capita than any other city worldwide. Glasgow's contribution to music was recognised in 2008 when it was named a UNESCO City of Music, one of only three cities in the world to have this honour. Manchester played a role in the spread of dance music such as acid house, and from the mid-1990s, Britpop. London and Bristol are closely associated with the origins of electronic music sub-genres such as drum and bass and trip hop.