On 15 May, an escort vehicle with a nuclear convoy broke down near Bicester, holding up a convoy taking warheads from the nuclear bomb factory in Burghfield, Berkshire, to Coulport in Scotland.
More nuclear weapons were moved across England and Scotland in 2016 than in previous years, according to Nukewatch, who monitor nuclear warhead convoys.
The number of convoys was similar, but twice as many were carrying nuclear weapons, Nukewatch estimates.
Nukewatch believes convoys in the first half of 2016 transported the more accurate and destructive upgrade of the Trident Mark 4A warhead, to be loaded onto HMSVengeance.
Topics: Nuclear weapons