Exactly what course are they offering you? Law with foundation means you do an extra year at the beginning and then transfer onto the first year of the LLB Law degree. If that is what they're offering, it might be worth doing; you need to decide if you like Lancaster enough to spend an extra year studying (and the increased cost).The 'International Foundation Course' is however a completely different thing. It's a huge waste of money, and as far as I know, there is no guarantee you can do the degree you want afterwards.