Tidings Y'all From Jolly Ole England

So I am now offically attending classes at Oxford University for the next three weeks. I have no yarn and 2 hooks but we haven't been able to find a yarn store. We did find a craft store in Dublin but it only had really bad acrylic woold blends in hidioues colors. We want to take a weekend trip to Wales and find some sheep and wool. If anyone knows of a yarn shop in Oxford or London or anywhere nearby please let me know. I am close to buying twine from the fairtrade store and making coasters because I need to crochet.