PPE is in my experience a very challenging programme that encompasses aspects from all three disciplines of Philosophy Politics and Economics in as much measure and detail as you choose for yourself in the first year. You must specialise quite early during the programme compared to other universities, but along with it, it covers each subject matter in greater detail than you might expect. If choosing to go for the Q-step stream, ready yourself to spend a significant part of your week learning to code and working with statistics. If you enjoy politics and like approaching political questions from either a philosophical or economic point of view (but not both) I recommend PPE at UCL.