Broadband speeds criticised as a 'postcode lottery'
21 March 2014 Last updated at 15:37 GMT
Broadband firms should give customers the speed and service that they pay for, consumer group Which? has claimed.
It comes after a survey found 45% of customers experienced slow download speeds.
Think Broadband editor Andrew Ferguson said the broadband speeds were a "postcode lottery".
He told BBC Radio 5 live's Wake Up to Money: "Literally it can mean just move 100 metres, you can triple or quadruple your speed."
Ofcom said measures were already in place for customers suffering with speed-related broadband problems..