O2 chief executive Ronan Dunne steps down following merger collapse

O2’s chief executive Ronan Dunne has stepped down in the wake of its proposed merger with Three falling through.
The news of Dunne’s departure comes a few short months after Europe’s competition commissioner blocked CK Hutchison’s proposed £10.5bn acquisition of the O2 mobile network in Britain, which it had planned to merge with its own mobile business, Three.
Dunne had previously said he would leave O2 once the takeover was complete. His departure ends a near 15 y