Each chapter in Clayden's Organic Chemistry is accompanied by a set of problems which are available online via Oxford Learning Link: Organic Chemistry 2e Resources.
To access this content you will need to set up an account for Oxford Learning Link using your university email address and own unique password (*please note, you should use your 'name@newcastle.ac.uk' university email address). When doing so you will also be asked for a registration code and here you should enter the password that is located on page i of the Clayden eBook (see link above). After registering, you will then be able to log in and access the end of chapter questions and resources.
If you experience any problems when registering try using a different or incognito browser.