I had to buy some computer equipment when I was in London and lamented the prices greatly. I also saw a great difference in grocery prices, and the prices for clothes in the UK drove me right out of the stores. I was looking at cheaply-made off-the-rack suits for prices I could get a Hickey Freeman for over here. Doc Martins have always been cheaper here.
We're mega-mall mania. I dated a student from Germany who went on an insane shopping spree here because she simply could not believe how cheap clothes were. She also commented often when we'd go out to eat how much cheaper the bill was than in Bruge, Kassel, or Paris.
So, bring some money when you come, and only pack half your suitcase.
