The Cambridge-headquartered inkjet developer made a Stock Exchange announcement about the incident.

In the statement, Xaar said that the cyber security incident had involved “unauthorised access to its computer systems”.

The firm said it took “immediate action” and has brought in external forensic cyber security experts to investigate what happened.

“Xaar has contained the incident and not experienced any impact to business operations and continues to fulfil all customer requirements. To date there is no evidence that any data has been extracted.”

The business is using its disaster recovery backup to restore “all systems, applications and data”.

It has notified law enforcement, the Information Commissioner's Office (ICO) and the National Cyber Security Centre (NCSC), as well as regulators.

Xaar’s website has not been affected. The firm’s share price slipped by 5.58% to 127p following the news.

In recent weeks the NCSC, which is part of GCHQ, has warned of several ransomware attacks against UK education establishments. This involved a spate of online attacks against schools, colleges and universities as students returned to learning.

NCSC also urged all UK organisations to take action to patch a vulnerability in Microsoft Windows Netlogon, also known as ‘Zerologon’.