You should be able to sign in using your email address and password on the Sign In page. Please make sure you log in with the email you signed up with. The most common reason for people being unable to log in, is because they are using the wrong email address. For example, if you signed up with a private Apple ID, you need to log in by clicking on the Sign In With Apple button. Likewise, if you have signed up with Facebook, you can only log in by clicking the Facebook log in button.
If you forgot which email or password combination you used, not to worry! You may need to reset your password by clicking the Reset Password button: https://www.daymade.co.uk/password-reset.
If you can't log in because you only have a guest account, please make sure to create an account first. You must use the same email you have originally entered with, in order to access your details (and prizes!).