10km/hr trips makes Dublin the world’s second slowest city centre

Travel times increased last year in 21 of the 25 UK cities analysed (Aaron Chown/PA)

London has the world’s slowest city centre for drivers because of widespread 20mph speed limits, according to new analysis.

Journeys of 10 kilometres  in central London took an average of 37 minutes and 20 seconds last year, location technology company TomTom said.