Go straight on at the next, large, roundabout, straight across at the A4 traffic lights, then follow the road through several sets of lights.
Across the next big roundabout.
Turn left at the next (double) roundabout (bottom of the map on the right).
Ignore the first right, follow the road round, and take the second right (Crown Lane) just before the 40mph sign.
Caldicott is almost a mile down Crown Lane, at the top of the hill, just before you get to the road junction.
FROM THE NORTH (M40)
Distance from the M40 junction - about 3.4 miles.
Take Junction 2 on the M40
South on the A355 (Slough). follow the road about 2.5 miles fo the 30mph sign, and take the next right. This is Beeches Road (see map on right).
Go to the T-Junction at the end of Beeches Road and turn left. Follow the road round, veering sharply right, and then just before the road veers right again, go straight on. Caldicott is IMMEDIATELY on the left after the junction.
For personalised directions, try the Google Map above.