The 2391 is designed to enhance the underpinning core qualifications that some believe are not necessary to be a "qualified" electrician.If there's no practical training then what's the point in the 'course'? Waht DO they teach on them?
The expectation is that candidates taking the course have a good working knowledge and understanding of the regs, electrical installations and a level of on site practical experience. The actual course if taught properly is just revision of parts of previous qualifications relavent to test and inspect
I took the course and exam back in 2006 and having 30 years experience it wasn't a difficult exam but the time allowed to complete all the elements is tight and does build the pressure especially when I took the theory and practical we were in the middle of a heatwave
Not sure how it is done now but for a number of years now it has become quite common for the course to just review past papers and learn the answers parrot fashion and rely on memory to get you past the post and IMO does actually make the 2391 a bit worthless without other core qualifications to support it