Help with custom footer that won't go away!

Hello, I’ve recently taken over a wordpress site which is set up with the twenty ten template. I’d like to replace it with the yoko template and give it a general over-haul. I can do that no problem, but what I can’t work is how to get rid of the text of the foot of the page:

The URL is: http://www.rst.org.uk

It’s not the wordpress credit that’s the problem, it’s the bit below that with links to ‘Home’, ‘Privacy Policy’, ‘Terms and Conditions’ etc. I can’t work out how that’s been put there and how to edit it, or get rid of it. When I apply a new theme the text stays there in the same colour and font, which makes it stick out like a sore thumb. I’ve checked the footer.css file and there doesn’t seem to be anything in there that is creating it, and presumably that file is overwritten when a new theme is applied anyway?

Thanks in advance for any advice you can lend me!