The White House has announced a ban on some U.S. investment in China in sensitive technologies such as computer chips in the latest ratcheting up of Washington's disassociation from Beijing amid perceived national security risks. Drew Angerer | Getty Images News | Getty Images LONDON — U.S. moves to de-risk from China with a new investment ban suggest that Western allies may be learning from national security failings in Russia, according to analysts. The White House on Wednesday announced a ban on some U.S. investment in China in sensitive technologies such as computer chips, in the latest ratcheting up of…