06:30Emma Britton14/02/2018: 20 mph, science of love & an iron lung!BBC Radio Bristol Duration: 2 hours, 30 minutes Wed 14th Feb 2018, 06:30 on BBC Radio BristolBristol City Council is reviewing its 20 mph policy in the city. Is 20 plenty?GenresEntertainmentBrandEmma Britton Source: BBC Online