An extra £1bn to speed up broadband and install speedier phone networks will be pledged by the Chancellor tomorrow.

The Department for Culture, Media and Sport will decide where to spend the pot of cash allocated this week, which the Treasury said would go towards 'full-fibre' broadband - a service which could download an entire series of Game of Thrones in less than a minute.

After announcing roads cash at the weekend, the Chancellor today set his sights on digital infrastructure.

The Treasury claimed the money could see two million more homes and businesses connected to the high-speed and more reliable broadband which can stream Ultra-HD TV without buffering.

The broadband money will be create a £400m new Digital Infrastructure Investment Fund to boost commercial finance for emerging fibre broadband providers looking to scale up.

Currently only 2pc of the country's premises currently have access to full-fibre connections. The government hopes the new fund will be matched by private finance.

The government will also spend £700m on 5G trials which will be decided by the Department for Culture, Media and Sport.