Junction 28 of the M25 onto the A12.
Follow signs for Ipswich.
At the junction of A12/A14 follow signs to Felixstowe (you are now on the A14 for a few miles). Left on the A12 (signed Yarmouth/Lowestoft). Proceed over 3 roundabouts. At the 4th (traffic lights), turn left onto the A1214, after approx 600 yards turn right into Hall Road. Kesgrave Hall is on your left