Libya: MoD says no-fly zone having 'very real effect'
The military operation over Libya is having a "very real effect", according to the Ministry of Defence.
Major General John Lorimer said Colonel Muammar Gaddafi's assault on Benghazi had been "stopped in its tracks".
The coalition operation to protect civilians from attack has entered a fourth day, with air strikes being made overnight against Libyan armed forces.
The BBC's Caroline Wyatt reports.