WpLeader

I think this is not depending on theme, its depending on diff SEO plugins.

Simple right click (mouse) on your image, and look at url.

Then go to your hosting, in folder where your picturers exists wp-content/theme/Londonlive/images(or someth like that) and try to open them in browser then compare urls

If in your theme folder no pictuers at all, only way find that pictures somewhere or take another theme

May be your WordPress theme has wrong ways to folder where they exist? Check it