How to reduce banner space in Offroad theme

Can anybody tell me if there is a way that I can reduce the banner height in the Offroad theme?

If you have a link to the site, it would help to see what needs adjusting.

Hi NeilUK,

thank you so much for your quick response. I now changed to another theme. It seems to be working for me.
I have another issue though but I guess I will search if there is an answer for it on the forum before bugging you:-)

Thanks again.