'Views my own' no defence for opinions shared on Twitter by BBC News staff, updated guidelines state 
Regional print journalist Liz Bates takes Channel 4 News political correspondent role 
Carole Cadwalladr will defend 'true' claims about Brexiteer Arron Banks in libel battle 
Minister fails to deny police are spying on journalists over diplomatic cables leak 
Cricket World Cup picture wrap helps boost Times sales as BBC marks record online figures 
