Virgin Media Business has been approved to provide cloud services under the G-Cloud framework initiative.
The approval means that public sector organisations will be able to sign up for Infrastructure-as-a-Service (IaaS) services through the broadband provider.
A CloudStore service - which works as an online catalogue - is to be introduced, allowing buyers to draw comparisons between suppliers.
"G-Cloud is the biggest private cloud project that the UK has yet seen and an enormous opportunity for the public sector to transform its computing landscape and cost base as and when it wants to move things to the cloud," said Lee Hull, Director of Public Sector for Virgin Media Business.
"As an approved framework supplier we'll be able to offer faster, simpler access to our technology and network which has been helping the public sector to power its communications for almost two decades already."
G-Cloud is the next big step on a journey to improved and cheaper technology for the public sector, Mr Hull stated.