A good example of a web design brief please?

I need to submit a web design brief to web design agencies. I've never done a 'web design brief' before. Does anyone kindly have any examples to link to? Know of any good web design agencies I should submit the brief to? Thanks.
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[url=http://www.clearpixel.net]Web Design Agency[/url]|[url=http://www.clearpixel.net]Web Design London[/url]

This website really isn't for web design but I am sure there are other forums that would meet your needs.