Brsk has begun work in Salford to enable 25,000 homes and businesses in the city to access full fibre broadband.
Community Fibre has now passed more than one million residential properties across London with its full fibre network.
The altnet has expanded its footprint by 75% in the last 12 months, supported by Warburg Pincus LLC, DTCP Railpen and NDIF.
Theo Blackwell, Chief Digital Officer for London said: “The Mayor's Connected London team and Community Fibre work closely together to make investment happen on the ground.
“Together we are bridging the digital divide and improving London’s broadband infrastructure for the future, helping to build a better, fairer and more prosperous city for all.”