Can anyone help me solve iTunes store display issue

Hi, my iTunes store display suddenly changes, I'm using a macbook pro with yosemite and no prior issues. This morning the iTunes store format has defaulted to the below image, can anyone help me fix/ reset?

I've tried restarting and logging in/ out of iTunes, but same issue.

When I access iTunes store for a split second i can see the normal horizontal format, then it defaults to a vertical by product view, it's impossible to navigate/ make purchase.

Any help/ advice most welcome, thx Philip