Not sure, but wire shark would tell you if you run it on a Mac while launching the App Store.

Thanks David, that was my next step, thought i'd ask the nation first though!

As suspected, the apps themselves and text are hosted with Apple but the images are still using Akamai.

Hi, please can you advise how to fix it. Have exactly the same problem as you above, however, when connecting via ethernet, all images load. I can see the images are hosted at http://a1.mzstatic.com...

@dnx im assuming you will have different web filtering and/or firewall rules in place in wireless and wired connections.

You will need to look at the rules that are set up and change them to allow the traffic.