NUCLEAR staff at Scottish naval bases began strike action yesterday, accusing bosses of carrying out a “systematic campaign” to undermine their union and “victimise” shop stewards.

Civilian staff will ban overtime and on-call duties at the Coulport and Faslane naval bases, coinciding with a series of staggered periods of strike action.

Their union Unite said the action will cause “major disruption” to all areas of the bases, including the Nuclear Operations Department, and is likely to affect naval operations until mid-June.