A ransomware attack on schools in South Gloucestershire is continuing to cause major disruption.

Tuesday's 'highly sophisticated' attack breached multiple layers of protection of the IT system shared by schools in the Castle School Education Trust (CSET) and partner primary schools in South Gloucestershire.

CSET and South Gloucestershire Council are now working to restore IT systems to the 23 affected schools but Joe Docherty, headteacher of Thornbury's Castle School, warned more disruption is to follow.

In a post on the school's Facebook page he said: "A cautious and methodical approach is being taken to ensure that systems are restored safely and securely.

"Although some systems have already been restored, others remain offline, and there will be continued disruption over the coming days.

"This highly sophisticated ransomware attack has caused significant disruption to our schools, and we are grateful to our staff and pupils for their patience and understanding as we work together to restore IT systems.

"We would like to reassure the community that all of our schools remain safe and no pupils are at risk as a result of the ransomware attack, and we are working to ensure that their education continues with minimal disruption."