LONDON (BBC): The “fastest ever” broadband speeds have been achieved in a test in London, raising hopes of more efficient data transfer via existing infrastructure. Alcatel-Lucent and BT said speeds of 1.4 terabits per second were achieved during their joint test - enough to send 44 uncompressed HD films a second. The test was conducted on a 410km (255-mile) link between the BT Tower in central London and Ipswich.