Rossiter Road in Wandsworth recorded the lowest broadband speed in London and one of the slowest in the UK, according to new data from comparison site Broadband Genie.
Residents of the street recorded an average download speed of just 1.74Mbps, well below the 139Mbps average for London and 80 times slower.
That speed is not even enough to stream shows or films on Netflix or Disney+.
By comparison, the fastest street in London, Reynolds Avenue, recorded an average download speed of 1.01Gb.
Seven of the ten slowest streets in the capital recorded internet speeds below 10Mbps.
Alex Tofts, a broadband expert at Broadband Genie, said: “No one should have to put up with sluggish broadband.
“It is a utility we rely on for work, education, essential services, social interaction, and more.
“Our analysis found many people on the slowest streets can upgrade their broadband.
“We encourage anyone who is frustrated with their broadband to check they are receiving the speeds they pay for.
“If you’re consistently below the advertised speed, you can leave your contract early penalty-free.”
Mr Tofts added that users should check what other options are available in their area using a trusted comparison service.
He said: “If you’re one of the 8.8 million people in the UK out of contract, it’s likely you can get a faster deal and still reduce your monthly bill.”
All of the slowest streets in London have access to superfast broadband of 30Mbps or more, and seven out of ten even have access to full fibre broadband.
Wandsworth appears twice in the city’s slowest list, with Fontenoy Road also performing poorly at 3.94Mbps.
North Circular Road in Brent came in second on the list with an average of 3.39Mbps, while Ravens Way in Lewisham recorded 3.8Mbps.
Other streets on the list included Cromwell Road in Newham (5.45Mbps) and Downage in Barnet (8.44Mbps).
The findings suggest that the slow broadband speeds are not due to infrastructure, but rather to residents not being aware of faster available options.
