Meanwhile, Irish hospitals suspected of being hit by the worldwide cyber attack had been targeted by a different, older virus, health chiefs have revealed.
That's down from seven yesterday.
Dr Anne Rainsberry, the national incident director, said: "There are encouraging signs that the situation is improving, with fewer hospitals having to divert patients from their A&E units".
The update says: "If you have a planned operation, procedure or outpatient appointment at a hospital affected by this incident, please visit the hospital website for further advice and information about routine services at this time". However, they have now confirmed that services have returned to normal.
People with diabetes who have blood tests or other appointments with their GP are urged to attend unless they are contacted by their surgery and told otherwise.More news: Unified Chelsea deserved title triumph: Manager Antonio Conte
The West Herts Hospitals NHS Trust - which runs hospitals in Watford, St Albans and Hemel Hempstead - also experienced IT failures last week.
However, the note said that no GP practice computers had actually been infected by the malware.
In the case of this ransomware attack, Microsoft released a patch weeks before the attack hit, which would have protected systems by not permitting the ransomware to take hold.
This week, the trust said that all three of its hospitals were open and running but added that there may be "some delays" to a few of its systems.
GP practices in the North East of England, which were impacted by Friday's cyber-attack on the NHS, are now able to use their IT systems again.
It still has diversions in place for Trauma, Stroke and urgent heart attack treatment, where diagnostic services are required.