The easiest way to raise and FOI (it's easier than sending an email) is via
http://www.whatdotheyknow.com
Type in say CAFCASS
And up come all the FOI questions filed against CAFCASS.
THEY HATE US USING THIS SITE!!!
As it forces them to answer us in the public domain, and their answers are published all over the internet, available to reporters etc.
So if you want to raise an FOI in 2 minutes, or have a nose at what questions have been asked, go have some fun.
And it's FREE!
