Featured Image at top of blog page

Hi, love the theme, thank you. I am working on a website for a client where they want a full width image across the top of each page...this is fine and I have enabled the featured image option across each page. Unfortunately I cannot get the featured image to display on the blog posts page as it seems that functionality is possibly disabled in the theme...please can you let me know a way that I can get the featured image to display at the top of the posts page with the individual posts then displaying underneath? For reference, the test URL is http://s328332815.websitehome.co.uk/Clinicept-WP/ Here is an example page where the featured image appears fine - http://s328332815.websitehome.co.uk/Clinicept-WP/clinicept-research-and-development/ Here is the blog posts page where I would like the featured image to also appear: http://s328332815.websitehome.co.uk/Clinicept-WP/news-blog/ Thank you :)