It may not directly be a requirement, however you have to show that youhave the nescessary skills, if you've not attended a course, then you'll need to prove experience.
In practice on a good course you'll learn what would take months to learn in experience, though even then you're just starting...
It will save you a small fortune and considering the rest of investment that you will make in getting MCS registered, it is a very small element of teh ÂŁ20k plus cost.
The best all round courses that we've found (as they have no 'agenda') are the ones run at Sharp's Renewable Energy Academy at Wrexham, because they cover all aspects of the job from the electrical design, through site surveying to roofing, so you get a great 'kick start'.
'It would probably be just the paperwork side I'd need help on' I'm afraid that that is just a slight understatement. Jump in with your eyes wide open!