Resident doctors will take industrial action next week.
The four-day strike is set to begin from 7am on Monday, June 15, until 6.59am on Friday June 19.
It is the latest action as part of their long-running pay dispute – next week will be the 16th action since 2023 they have taken.
The British Medical Association wants resident doctors, formerly known as junior doctors, to be given a pay increase that will make up for what they say is the 26% loss in the real-terms value of their salaries since 2008-09.
It also wants the NHS to expand training places for resident doctors.
New Health Secretary James Murray, who replaced Wes Streeting, said in May that the demands were unrealistic and unaffordable.
People are warned that there may be disruption as a result.
Professor Craig Harris, chief commissioning officer at NHS Lancashire and South Cumbria Integrated Care Board, which commissions health services for the region, said: “Industrial action will still have an impact and people will find that waits in hospitals may be longer and some planned appointments will inevitably be cancelled.
“Unless you have been informed by us that your appointment won’t be going ahead, please attend as normal. Similarly, we urge anyone in need of urgent medical care to continue to come forward as normal, especially in emergency and serious life-threatening cases – when someone is seriously ill or injured, or their life is at risk.
“While summertime was traditionally a little less busy in hospitals, that is no longer the case and we ask everyone to use services appropriately during this time, including using 111 online for quick and easy medical help.”
