Virgin Media says it has overcome a national broadband outage which affected thousands of customers.
The problem was caused when set-top boxes and modems in customer homes were remotely updated, which led to customers losing their IP address, which is necessary for them to connect to the internet.
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Problems started this Monday and went on into the week, said Virgin Media.
Some customers were left without a connection for just a few minutes, while others were down for hours.
The customers worst affected were those located in northern England.
Updated set-top boxes and modems automatically tried to renew customer IP addresses, but Virgin Media network routers, which handle such requests, were unable to cope, reports the BBC.