LONDON — The U.K. government will reportedly block Rupert Murdoch from buying a U.K. terrestrial TV channel in its current revamp of cross-media ownership laws.The upcoming communications bill, to be published in May, is said to retain restrictions on newspaper companies owning terrestrials. Murdoch’s News Corp is parent to a number of British papers, including The Times and The Sun, and has a controlling 36.3% stake in satcaster BSkyB. Present rules prohibit any newspaper company with more than 20% of the market owning more than 20% of a terrestrial channel. It is reported that that will likely remain the case. Murdoch is known to have long coveted a piece of the British terrestrial market.