It still looks the same to me, I'm referring to the single posts page for the posts shown on the What's On page – some I have set up to use the Whats On content template. Please see the link I orginally sent you via email – it shows the Singing in the Rain post page.
I do not want any changes being made to ordinary post pages – ie the posts on the Blog page. I will only be using a content template for the single posts from the What's On page.
On these What's On posts what I want to achieve is the featured post image on the right where it normally is, the post title to the left of the featured image at the top and the post body text content and custom fields (Showing dates) underneath the post title and post body text.
Does that make it clearer?