BBPress with Human theme

I have put bbpress on a human theme. all is well except on the centre column, there is a huge space between the forum name and the list of forums. I want to reduce the size of this gap but I cannot see how or where to do it, or even why it is there.

Can someone help me shrink the size of this gap / space please.

Thanks

The page I need help with: [log in to see the link]