An unexploded Second World War bomb has been dislodged by dredging work in preparation for the next generation of Royal Navy aircraft carriers.

A cordon has been put in place in Portsmouth Harbour, which is preventing cross-Channel ferries from entering or leaving the Hampshire city's ferry port until the device can be towed out to sea to be detonated.

The discovery comes after another 1,100lb (500kg) German bomb was found at the end of September by the dredging barge, which led to the evacuation of the nearby Gunwharf Quays retail and leisure centre.