The Communications Consumer Panel (CCP) has called on the government to deliver the full set of measures that the Digital Britain report laid out.
The report called for reliable broadband for everybody in the UK and for investment in fibre-optic infrastructure to be stimulated, among other measures.
Anna Bradley, chair of the panel, claimed the government now faces a "challenge" to deliver the "full package of measures".
She suggested that broadband is essential for everyone so the government needs to "press on with plans to implement its universal broadband commitment".
Ms Bradley added: "To maximise the benefits for the economy and society, next-generation broadband needs to be available to everyone."
Stimulated investment in fibre-optic broadband is needed, as the current market will only encourage deployment to two-thirds of the population and the "rest should not be left behind".
The CCP recently claimed broadband providers were "a long way" from being able to give consumers useful indications of actual speeds.