Trouble with RSS feed – help appreciated!

Hi,

I noticed recently that I no longer have an RSS feed on my wordpress blog. It’s obviously disappeared after I’ve done something, but I’ve no idea what I’ve done to cause this! The blog can be found here and the blog feed is here. If you follow that feed link then you can see that it’s not formatted as XML. Very strange.

Any help much appreciated!

Thanks a lot,

Andrew