Anji Hunter, former aide to Tony Blair and Anglo American's current group head of government and social affairs, will leave the firm at the end of August.
Stepping Hill Hospital is using Bell Pottinger North to help it handle crisis comms around the saline drip poisoning investigation.
Hill & Knowlton's UK MD of sports marketing and sponsorship Andy Sutherden is to head up a new global sports practice.
Oscar Pistorius, the Olympic athlete nicknamed Blade Runner, has appointed Fast Track to handle his PR in the run-up to London 2012.
WorldPay, the electronic payment processing firm, has chosen Octopus Communications as its UK PR agency.
Weber Shandwick has appointed Edelman's Amber O'Connor as UK business development director.
Melia International, the global hotel chain formerly known as Sol Melia, has hired Katch PR to focus on its name change and expansion.
Pinkberry, the frozen yogurt brand from Hollywood, California, has picked Frank PR to oversee its UK debut this summer.