Exit the M4 at junction 17 on to the A350 towards Chippenham. Turn right at the first roundabout (near to the services) and then follow the A350 over the next two roundabouts - sign-posted industrial estates.
Go straight ahead at the next roundabout (where the A350 meets the A420) and enter into Bumpers Farm Industrial Estate. Devision offices can be found on the left hand side just past Comet.