To access your website statistics, read this article.
If you are using Google Analytics in conjunction with your hosting account, you will not receive accurate statistics in the website statistics feature on your 123-reg hosting package.
This is because the traffic for your website will not be directed directly through 123-reg. It will go through the Google server then to 123-reg. This means that only 1 or 2 hits will show on your website statistics pages as the Google server will only show as 1 hit and 1 IP address.