tinsparrow,
In order to complete the theorectical side of the training you have to attend a school approved by the CAA. Now, when I did my ATPL's, us as students had to swipe in and swipe out of class everyday. This was all recorded on computer. By the end of each module the CGI knew how many classes you as the student had attended, therefore how many hours training you had received.
When it came to sitting the exams, you had to make an application to the CAA in order to sit them. This was all done through the school, where the CGI had to sign your application as evidence that you had met the hour requirements laid down in the regulations.
So with the above in mind, once you have passed all your exams and passed the practical skill tests, along with the hour requirements you will be eligible to apply for your commercial licence.
Also, just so it is clear, if you are on a modular course, the CPL course advertised will be for the 25 hours
flying training only, the school will require you to have completed the ground school as a pre-requisite i.e. the 200 you mention.
In summary all that I am asking is, what constitutes 'Theoretical Knowledge instruction'???????
The ground school
before you start to flying

.
Hope I havent confused matters.