1. Why would Mervyn King base the UK's monetary policy on some random guys from the internet?
2. Why would higher interest rates help the UK economy and/or make inflation lower?
JonR356 is right, however there is an up side of having a weaker economy in that it helps your countries exports.
Answer 2: Higher interest rates do tend to prop up a currencies value as they tend to reduce inflation. Higher rates tend to make inflation lower because the cost of borrowing goes up.