Labour has said it wants to tackle the UK's digital divide with a £1.6 billion investment in broadband infrastructure over four years.
The opposition is concerned that the connectivity gap between rural and urban communities will get wider if the government does not get a favourable deal in its Brexit negotiations, the Financial Times reports.
As a result, it is pledging to deliver minimum broadband speeds of up to 30Mbps if it wins the next general election.
Labour made the promise after examining research from the London School of Economics, which concluded that areas that already have slow broadband will lose out the most in the event of a no-deal Brexit.
The party believes the City of London would be particularly hard-hit, as its average download speed is currently just 13.8Mbps.
This comes shortly after the government published its Future Telecoms Infrastructure Review, which said full-fibre broadband should be installed in all new-build homes.
The proposal forms part of a wider effort to ensure 15 million premises have access to the technology by 2025, with a view to achieving universal full-fibre coverage by 2033.