News diary 21-27 January: Chris Evans makes Virgin Radio breakfast show debut and Prince William interviews Sir David Attenborough at Davos 
Diane Abbott claims BBC whipped up 'hostile atmosphere' against her ahead of Question Time appearance 
College offering NCTJ journalism courses blocks access to trade news website over article exposing '£1.4m debt' 
Buzzfeed UK editor-in-chief Janine Gibson leaving news website after three years at helm 
JPI Media could relocate or merge newsrooms across UK in property review 
