Are there any American/ Canadian/British Grocery stores in Poznan?

Hello,
I was wondering if any of you fellow Poznanians knew if there is a store (I've heard about one but don't know the name or location) in Poznan where I may be able to find Canadian/American or even British baking goods? or goodies in general?

Thank you in advanced :)

This is the place you have heard about:
kuchnieswiata.com.pl/oddzialy/poznan

You can also find various bits of British food at Marks & Spencer.

Thanks Harry!!! I'll check it out :)