Up to 145 support staff at the Great Western Hospital in Swindon are on strike in an ongoing dispute over leave and alleged bullying.
Their employer, Carillion, says its investigation is underway and it is condemning the action.
With fuel tankers voting overwhelmingly in favour of strike action, the Defence Secretary Phiiip Hammond says "if there is industrial action my colleagues in government would be looking to the military for some support."
Fuel tanker drivers have voted to go on strike in a row over safety standards. Around 2,000 of the Unite Union at various companies, including Chippenham-based haulage firm Wincanton, were balloted for the first national campaign of action for over a decade.
The MD of Manufacturing at Wincanton, Chris Kingshott, has called the action 'ill timed' and 'inappropriate'.
Fuel tanker drivers in Wiltshire based Wincanton have voted overwhelmingly in favour of strike action. Of the 71.9% of people who turned up, 68.4% voted in favour of strike action.
Unite drivers supply fuel to 90% of the UK's forecourts and the union said a strike could close nearly 8,000 petrol stations.
You can find out more about the strike action here.