Employment and lifestyle choices of a freelancer

It's becoming more difficult these days to find people who have had the same job their whole lives since leaving formal education, but tv/ film freelancers go some way beyond that. Has anyone tried recently to fill in a "previous work" section on an application form (e.g. voluntary work)? That can become a lengthy process. Same when it comes to previous addreses - I've moved for my current job, I'd probably move again (after what I'm assuming will be a move back to London in early 2012), I'd like to work in other countries... and people who haven't had close experience of this sort of lifestyle just don't understand.
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