Trying to change images on website.

Hi,

I am a volunteer for a soccer club https://www.mirandamagpies.com and our website guy has gone. I’ve offered to look into updating our website on a consistent basis and all is going great, wordpress is really easy to use but I’m having one major issue.

Look at my website, at the top you see Sutherland Holden and Bartercard as sponsors, either side of a “Grounds Open” widget thingy.

How do I remove or change those pictures? I’ve been through everything, I cannot work out how to edit or change them.

Any assistance is appreciated.

P.J.