As a governor, the personal data you send over email must be kept secure. Use a secure school email address to help you to meet the GDPR requirement to prevent a data breach and respond to subject access requests quickly.
You should use formal meetings (in person or virtually) as much as possible, but sometimes you need a way to communicate in-between meetings. Understand the rules and what's appropriate when using virtual tools like GovernorHub or email to conduct governing board business.
You have the right to take 'reasonable' time off work to carry out your governor duties. Find out what the rules are, if your profession is exempt, and what to do if you're having problems with your employer.