Unknown Link on website

Hi Guys, having a bit of an issue with a unknown link at the bottom of this website. I think it may have been hacked. http://ulstergrandprix.net

I have circled the link here….
http://s33.postimg.org/mm3fdx1gf/Screen_Shot_2016_05_25_at_11_02_53.jpg

How do I go about removing this? I can see the line of code from the source but how do you go about removing it from the site

Many thanks
Mylo