Ambulance bosses are urging people to only call 999 for life-threatening emergencies with a second national strike taking place as part of the on-going National Health Service pay dispute.
East Midlands Ambulance Service has issued the warning ahead of strike action due to take place between 7am and 11am on Monday.
This will be followed by further action by EMAS trade union members during the rest of the week, until and including Sunday, November 30.
A similar period of action was taken on October 13 during which 10 per cent of its workforce took full strike action.
Of the 350 frontline colleagues on duty, 50 per cent worked normally and 50 per cent took some form of industrial action.
Sue Noyes, chief executive at EMAS, said: “Our contingency plans and negotiations with colleagues and Trade Unions helped us mitigate the impact the previous national strike had on our service.
“We will take the same approach this time and continue to work in partnership, both regionally and nationally, to ensure we continue to deliver emergency care, save lives and reduce any unnecessary anxiety and concern for our patients.
“The national strike will cause difficulties for all UK ambulance services and the public are reminded to use 999 appropriately during this challenging period.
“The action will affect non life-threatening emergency calls because our priority will have to be those who require an immediate response.
“Other NHS services are available to support people with minor illness or injury – they include NHS 111, general practitioner, local pharmacy or walk-in/urgent care centre.
“Thank you in advance to people in our local communities for using our emergency service appropriately.”