Hi john-wiggins,
Thanks for coming back to us on this one.
As you're an existing customer, you should be able to access the email address directly. You will need to log in to My VM here. Once logged in, go to the Manage My Profile section and you can reset the password to the email account.
If the email address isn't there then it's likely connected to a different account you may have held in the past. If this is the case then we'll need to look in to things further to check.
Let me know how the above goes first and we'll take it from there.
Thanks,