tag:bbc.co.uk,2008:cps:playlist:mediaAsset:14124267 Police: 'No further investigation required' Metropolitan Police Assistant Commissioner John Yates says that there is no new evidence to warrant further investigation into claims that a huge mobile phone hacking operation was launched by the News of the World. 2011-07-12T11:12:42Z News 14124267 99116 blocked tag:bbc.co.uk,2008:cps:advert:mediaAsset:14124267 tag:bbc.co.uk,2008:cps:ident:news:video:640x360 tag:bbc.co.uk,2008:cps:mediaAsset:14124267 tag:bbc.co.uk,2008:cps:playlist:mediaAsset:8143119 Conservatives under fire over chief advisor Tory leader, David Cameron, has been criticised for appointing a man at the centre of phone hacking allegations as his chief advisor. tag:bbc.co.uk,2008:cps:playlist:mediaAsset:8142897 Brown: 'Serious questions to be answered' Gordon Brown says there are serious questions to be answered following claims that a huge mobile phone hacking operation was launched by the News of the World.