It happens to all of us, you will be using so many different email address and password combinations throughout the day, it's hard to remember which email address you have used.
If the email address you thought you had used isn't working try the 'Forgotten your Password?' link. If you enter an email address that hasn't been used, the system will say 'Email not found.' Please try another email address.
If you're just not sure, get in touch with our Support Team: email@example.com or 0333 0111 899, we can quickly check against your name and the email account you're using. You'll need to confirm some other information e.g. address or GMC number to make sure it's you!