You may have heard about bomb hoax emails being sent to a large number of schools. These emails are suspected to have been sent by an online group calling themselves Apophis Squad and that this group is linked to other cyber activity, including Ransomware and Denial-of-service attacks.
We would suggest you are extra vigilant when dealing with emails. Do not open emails if you are unsure about the source or open attachments within emails, unless you are sure it comes from a trusted source.
If you suspect you have been contacted by Apophis Squad in any form, report this to Action Fraud.
You can find further information including best practice for protection on the National Cyber Security Centre website.