West on the A35 from Dorchester, follow around Bridport, signed posted Hontion, until you see the sign for Symondsbury (Miles Cross) turn right, then almost immediately left to Symondsbury. The site is straight away on your right.
Heading East from Hontion on the A35 after you have passed through Chideock take the first left turning for Bridport and Symondsbury left again to Symondsbury site is on your right.