To update your details your account must be fully verified.

Navigate to My Profile > My Details and click on Update My Details next to your personal details.

Enter and confirm your new email address then click Save.
We will send a verification code to your mobile. You will need to enter this code and click Continue
We will send a verification code to your new email address. You will need to enter this code and click Continue
We will send you email and SMS confirmation that your details have been updated.

Note: This email address will be used to notify you of activity on your account such as deal confirmations and availability of online documentation. This will not change your login details.