Virgin Media has begun the process of upgrading its ultra-fast broadband customers from 100Mb to 120Mb download services.
The firm is carrying out the network improvements as part of its 'Double Your Speeds' programme, which was announced earlier this year.
At no extra charge, Virgin Media is at least doubling the speeds of its up to 10Mb, 20Mb, 30Mb and 50Mb broadband deals.
Households currently receiving up to 100Mb broadband services will not see a 100 per cent increase in download capabilities - but they will be able to access up to 120Mb broadband.
At present, this is the fastest service available over the firm's network.
"The new 120Mb tier continues to push the boundaries of broadband speeds available in the UK and will ensure Virgin Media broadband customers continue to receive some of the fastest speeds in Europe," the company stated.
Virgin Media said it has already upgraded 40 per cent of its network for faster speeds as part of its nationwide broadband enhancement programme.
This means that two in every five subscribers can now take advantage of additional bandwidth and faster speeds, at no additional charge.
"Virgin Media’s broadband service now offers speeds of 30Mb, 60Mb and up to 100Mb/120Mb, making it the only next-generation internet service provider in the UK with super-fast speeds as standard," the company stated.
Jon James, Executive Director of Broadband at Virgin Media, claimed the firm "has led the greatest developments in broadband in the UK over the last decade".
"Our 120Mb service continues to ensure that our consumers across the country get the very best that today’s technology offers," he stated.
The 'Double Your Speeds' programme is due to be completed around the middle of 2013.