Helen Goodman, the Shadow Minister for Media, has called on Ofcom to clarify its position on the UK's 4G broadband TV interference problem.
Up to two million households could see their Freeview services affected when next-generation mobile broadband services launch in the 800MHz frequency band.
Ofcom has acknowledged the problem and earlier this year carried out a consultation, which closed on April 19th, in a bid to tackle the issue head on.
However, Ms Goodman expressed concerns that two months on, there has been no further comment from the media regulator.
"With 4G services now less than a year away from becoming active we really are running out of time to find a solution," she claimed.
"At the moment it is unclear whether the government will compensate people affected or expect the industry to do so."
Ms Goodman said it is "equally unclear" whether people will have enough time and support to mitigate the potential effect of interference before 4G services commence.
She asked Ofcom to indicate when it plans to make recommendations, and also to inform the public of its strategy to resolve the issue prior to the launch of super-fast mobile broadband.
"There is a real danger that unless urgent action is taken millions of viewers will see their Freeview services disrupted. This would be completely unacceptable," Ms Goodman stated.
Ofcom is set to auction off spectrum in the 800MHz and 2.6GHz frequency bands to mobile operators later this year.
This will allow broadband providers to increase dongle speeds and provide mobile broadband coverage in more areas of the UK.