Thanks for your reply, :-)

Is there away to edit the tags, categories and date archive pages to use the avia layout I created for my Blog page? I used those functions snippets yesterday but they just change the layout. What I want to do is to apply my blog page avia template to the archives tags and categories for a consistent appearance.

Thanks, I found https://kriesi.at/support/topic/add-featured-image-to-search-results/ which has worked perfectly. It may also have been the image sizing from a previous theme as I needed to run a plugin to fix the images as well. Thanks for getting back to me though much appreciated.