Remove image banner on individual pages?
On the body element there are page classes for each "node", and in Drupal every node has a number, called the "nid" or "node id". 

The services page nid is 65. 

Look at the body element in your browsers inspector (right click, "Inspect"), you'll see something like this for the body:

&lt;body class="html not-front not-logged-in one-sidebar sidebar-first page-node page-node- page-node-65 node-type-page i18n-en-gb blue"&gt;


For every node in the site there is always going to be the page-node-[node-id] class, e.g. page-node-65

By "banner" I assume you mean the photo of the oil rig? If so you can use the body class and the wrapper on that image:

.page-node-65 .cover {
  display: none;
}


But - consider this a stop gap solution, you need to figure out how the site is structured/built and try to remove the picture/banner from being there in the first place.