Come off the M27 at junction 7, then the A334, then the A27 north.
Turn right along the B3035 then the minor road on the left just before the hospital.
You will then see Monarch Way on your left – park here.
The Barrow is in the patch of grass next to the road.
There is virtually nothing to see here, just a very slight ‘mound’ in the middle of the grass. If you didn’t know it was there you certainly wouldn’t spot it.