Here's how to find my office at the Cavendish:
At ground-floor level, walk straight into the Mott Building from the Bragg Building (the corridor between the Canteen and the Stores, under the Bridge between buildings). Go through the first door on your right (into an open-plan area), and the door to my office is then the first one on the right.
My pigeon hole is next to the SP Office. To reach this, continue through the Mott Building from the Bragg Building. When you reach the goods lift, turn left into the Semiconductor Physics Group area; my pigeon hole should now be visible.
My phone number is (7)64179.