When you get to Heathrow or Gatwick buy a copy of High Fi News/Record Review or What High Fi and look up the ads for high end dealers. I maybe dating myself but if Audio T or Thomas Heinitz/Music in the Home is still around they are worth visiting. I know Mr. Heinitz has retired but I understood the store was still there. Also there are often after holiday sales of 50% off or more so you should ask about that - it's traditional in the London shopping areas.
