By Martyn Landi, PA technology correspondent.

Scores of new super masts could be built across the British countryside as part of Government plans to eliminate mobile phone blind spots.

Digital secretary Nicky Morgan said she wanted to shake up planning restrictions to allow mobile phone networks to build ground-based masts exceeding the current rules prohibiting structures over 25 metres on public land.

It comes as the Government launched a competition for rural areas which would see them host tests of groundbreaking 5G applications, as part of plans to spark a wider rollout of the communications technology.

Writing in the Daily Telegraph, Ms Morgan said plans also included firms investing in shared masts, allowing phone users to switch between providers to find the best signal.

She said: "To give such a proposal the best chance of success we need to make it easier for industry to build, share and upgrade mobile infrastructure.

"This means planning rules will be relaxed to enable existing ground-based masts to be strengthened without prior approval to enable sites to be upgraded for 5G and for mast-sharing."

She stressed the need to "get the balance right" between preserving the "sacrosanct" countryside and improving connectivity.

Former prime minister David Cameron previously bemoaned rural mobile phone coverage, and claimed he had to cut family holidays in Cornwall short as he was unable to keep in touch with world leaders.

Meanwhile, the £30 million 5G competition will see up to ten rural locations chosen to run trials of 5G-related technology, which would involve superfast 5G test networks being set up.

The Government said it hoped the scheme, called the Rural Connected Communities competition, could help stimulate investment in 5G and help countryside communities take advantage of the technology.

Similar schemes have already been set up in Orkney to remotely monitor salmon fisheries and improve the efficiency of wind farms, and in Shropshire, where 5G trials have been used to help the farming industry with targeted crop-spraying and soil analysis with drones and tractors.

Ms Morgan said: "The British countryside has always been a hotbed of pioneering industries and we're making sure our rural communities aren't left behind in the digital age.

"We're investing millions so the whole country can grasp the opportunities and economic benefits of next-generation 5G technology.

"In modern Britain, people expect to be connected wherever they are. And so we're committed to securing widespread mobile coverage and must make sure we have the right planning laws to give the UK the best infrastructure to stay ahead."

Housing and planning minister Esther McVey said: "We're committed to delivering the homes people across the country need, and that includes delivering the right infrastructure such as broadband connectivity and good mobile coverage.

"There is nothing more frustrating than moving into your new home to find signal is poor.

"That's why we are proposing to simplify planning rules for installing the latest mobile technology - helping to extend coverage and banish more of those signal blackspots, particularly for those living in rural areas."

Tom Watson, the shadow culture secretary, said: "This funding falls far short of the ambitious roll out we need to boost our digital infrastructure nationwide.

"5G and full fibre will be the basis of the innovative, green technologies that will underpin our future economy, but the UK's digital infrastructure is lagging embarrassingly behind.

"This Government must take bolder, faster action to deliver the digital infrastructure we need."