An NHS spokesperson said: “Systems are now back online, and patients with an NHS appointment this week should continue to attend unless told not to.

“Thanks to the hard work of NHS staff throughout this incident we are hoping to keep further disruption to a minimum, however there still may be some delays as services recover, particularly with GPs needing to rebook appointments, so please bear with us.

“It’s important that patients attend appointments as normal unless told otherwise. You can contact your GP in the usual way, or use your local pharmacy, NHS 111 online or call 111for urgent health advice.”