Taylor Swift was granted blue-light police escorts to her London shows after the Government's chief law officer put pressure on Scotland Yard, it was claimed last night. Sources said that Attorney General Lord Hermer was asked to intervene after the Metropolitan Police warned that giving the billionaire pop star such protection would breach its protocols. But it was unclear who in Government had requested that its top lawyer get involved, according to reports last night. However, it was claimed that it was only after Lord Hermer wrote to the Met that senior officers reversed their original decision and granted a level of security normally reserved for royalty and top-level politicians. The explosive