Three million homes in the UK have access to broadband speeds of less than two megabits per second, research released today shows.
The findings follow the government's promise that all homes in the UK will have access to broadband with speeds of at least 2Mbps by 2012.
Research commissioned by the BBC and Samknows shows that slow broadband speeds are not limited to rural areas, with many streets in towns and suburban areas affected.
Samknows has created a map of broadband speeds available in the UK by mapping a sample of postcodes in areas known to have poor broadband access.
The government announced plans to back the introduction universal broadband network service running at 2Mbps by 2012 in the Budget.
Communications minister Stephen Carter, who is conducting the Digital Britain review into the future of broadband, has defended the 2Mbps target as achievable, despite criticism that it lacks ambition.