You can reopen your account online on the registration page here.
1. Under 'Join as an individual' select 'Reopen an existing account'.
2. Sign in with your previous username and password. If you don't remember your username and password, use the 'forgot your username or password?' button.
3. Once signed in, you will be taken through the application process and asked to update or confirm your previous information before submitting the application.
Please note that if you've had a personal account in the past, you need to reopen that account rather than trying to create a new one.