It's not a problem, you'll have the course manual and highway code, which covers everything you need to know. You'll also receive handouts covering any classroom modules you miss.
It's possible to be taking the advanced driving test within three month if your keen, enthusiastic and practise the skills we teach you. However, it may take longer if you don't attend the modules and drive regularly during throughout the course.
Yes, see one above.
No, there's no written test, but you will be required to display a good knowledge of the highway code whilst driving.