Just a little bit of reassurance. 

The security and privacy of your data is a top priority.  I manage all client data through Power Diary, an ISO 27001-certified practice management system. This ensures that your personal data is protected by software that meets the highest global standards for information security management and complies with all applicable privacy regulations.  In the UK, that is GDPR which is believed to be the strongest set of data protection rules.  That means all the information I keep about you is safe.  I also don't share any of your information with anyone.