From Reading

Exit Reading on the A4 past Sainsbury’s Calcot. Cross the M4 towards Newbury and then follow the A4 for approx. 4 miles. At roundabout, take left turn onto A340 signed to Aldermaston and Basingstoke. Follow A340; after 2 miles go straight through the village of Aldermaston, (bearing right at top of main street).  Outside Aldermaston, go up a long hill and at next major roundabout (about another 2 miles); turn right into the entrance of Calleva Park. This is about 15 minutes past the M4 Roundabout.

At mini roundabout, bear left. After 50m turn left. Pass two buildings on right (second one has Vertec written on side) and turn right. About halfway down on right, We are at No.7 Comet House.
 

From Newbury/Thatcham

Exit Newbury on the A4 and follow the signs to Thatcham Station. Cross the level crossing and proceed up the hill following the signs to Brimpton. Do not turn right towards Basingstoke at Thornford Road, keep straight on. Follow this road through Brimpton . Foloow the road round to the right in Brimpton and pass Brimpton school. About 2 miles after Brimpton School there is a T-junction. Turn left and pass the Lakeside Garden Centre on the left. At the next roundabout take the first exit into the entrance of Calleva Park. This is about 15 minutes from Thatcham Station.

At mini roundabout, bear left. After 50m turn left. Pass two buildings on right (second one has Vertec written on side) and turn right. About halfway down on right, We are at No.7 Comet House.