Hi Chalky,
Time is at a premium on this course so they are unlikely to have time for practicing for the exercises but if you are a qualified electrician this should not be a problem for you.
Training centre will ask for proof of your qualifications at the start of the course, a SJIB/JIB grading card will suffice otherwise you'll need to take your C&G certs.
They allow plenty of time for the practical exercises.
EX01 involves safe isolation, installation of 3 cables on a lighting circuit incorporating Ex d, e & n equipment, testing & re-energizing.
EX03 involves installation of cables to complete a Ex i fire alarm system, correct connection of barriers in the non-hazardous area & testing.
Happy to help you if I can with any additional info, just send me a message.
Dave