Big tech is trying to weaken new digital markets regulator, Rishi Sunak warned

A legal battle is brewing over how giant firms will be able to appeal against new unit's decisions

Big tech is trying to use its vast coffers to neuter the powers of the UK's new tech regulator, Rishi Sunak has been warned, as a fight over the courts becomes the latest battleground for overseeing Silicon Valley.

Under the digital markets, competition and consumers bill, which is passing through parliament, the Competition and Markets Authority (CMA) will be empowered to set strict new rules on large online platforms such as Apple's App Store, Amazon's Marketplace and Google's search engine.