Not sure how this thread was bumped continuously for nearly 3 years... however, to people who also want to ask this question:
From 2015 Oxford, York, LSE, UCL, Warwick, Durham and many other universities offer Philosophy, Politics and Economics. These 6 have the best reputations. Oxford is the oldest and undoubtedly perceived to be the best, York was second to offer, and the rest rely on their existing reputation. The LSE and UCL courses were only introduced this year.
Do use course searches with unistats, etc. though as there are many other providers.