newspaper picture agency

Anyone got any hot tips on flogging photos to the media?
Or recommend and trustworthy and effective agency to handle the work?

I've used these before. www.solentnews.co.uk

I had some squirrel pics that Gary (cabstar) thought might be saleable. I read horror stories of people not getting paid by newspapers. So, I went with these guys for a 50:50 split

Haven't used them since. Forgot all about them when I got my aurora pictures back in Feb