To set training as mandatory:

1. Click on the Training and qualifications link
2. Click the Add and manage mandatory training categories link
3. Click the Add a mandatory training category button 
4. Select the training category that you want to make mandatory
5. Click the Continue button
6. Select which job roles need this training
7. Click the Continue button
8. If you chose the all job roles option, the training category will now be madatory for everybody in your workplace
9. If you chose the only selected job roles option, select the job roles that need this training and then click the Save mandatory training button