As is always the case, only those adults and children with genuine emergency needs should go to A&E. "It's a great inconvenience".
But Theresa May rejected claims the Government ignored warnings the NHS was vulnerable to a possible cyber attack, saying warnings had been given to hospital trusts.
Dr Wrigley was part of a team that drew up security guidelines for the government past year. Russia's central bank said it had recorded harmful software being sent en masse to Russian banks but that the attacks had been unsuccessful. "That means this situation could have been predicted but I guess it's a lack of funding which meant the update didn't take place".
A mother who gave birth to twin girls in the midst of the huge global ransomware attack has praised NHS staff who cared for her.
Worldwide investigators hunted Saturday for those behind an unprecedented cyber-attack that affected systems in dozens of countries, including at banks, hospitals and government agencies, as security experts sought to contain the fallout.
It also asked patients with pre-booked GP appointments to "please bring with you any medications, letters or paperwork you already have".
A spokeswoman for NHS Grampian said that it is not clear if patients at the affected surgeries have been informed that their surgeries had been hacked or not, because that choice lies with the individual practices. However we are still experiencing some problems with our imaging systems, so some appointments may still be affected.
"It shows that although we were dealing with adversity, keeping patients safe was the number one priority for every member of staff on shift".
Friday's attack was the latest in the growing menace of ransomware in which hackers deliver files to computers that automatically encrypt their data, making it unusable until a ransom is paid.
"Hopefully people are learning how important it is to apply these patches", said Darien Huss, a senior security research engineer for cybersecurity firm Proofpoint, who helped stem the reach of the weekend attack.
Dr Wrigley's Carnforth practice was one of those affected.
"At this stage, it does seem like that we have missed the major impact of this ransomware incident", Tehan said on Australian Broadcasting Corp radio.
"There are so many different organisations that make up the NHS, and the division of responsibility between them is extremely complex, and the way their funding is allocated is extremely complex", he said.
An NHS official says the two main issues are returning the computer systems completely back to normal, and managing to reschedule all of the medical procedures and appointments, reports Financial Times.
Labour leader Jeremy Corbyn blamed a lack of funding for the NHS, which has a projected budget of £123.6 billion this year, telling a nurses' conference on Monday: "Tory cuts have exposed patient services to cyberattacks".
Elsewhere in the county, Blackpool Victoria Hospital is nearly back to normal although there are still some delays.
The attack has left 47 NHS organisations affected with malware in their system, ranging from hospital trusts to commissioning support units.
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