Labour has told the government that its broadband investment plans are "not good enough".
According to Deputy Leader Tom Watson, the UK is on track to "have just seven per cent full fibre coverage by 2020".
Speaking to BBC News, he said: "It'll leave Britain in the slow lane for years to come."
Mr Watson was speaking after the government formally launched its £400 million Digital Infrastructure Investment Fund, which is designed to unlock over £1 billion for full-fibre broadband across the UK.
Labour has pointed out that the same cash had already been announced in the Chancellor's Autumn Statement in November last year, and again in the Spring Budget in March.
"This is yet another re-announcement from a government that just isn't keeping pace with developments in the industry," Mr Watson said.
Shadow Digital Economy Minister Louise Haigh has also criticised ministers for repeating a previous announcement, telling the Independent that it shows a lack of new policy thinking in government.