We parked in the Breamore House/Tea Rooms car park and followed the path up past the house through the wood. Exiting the woods and following the path round the edge of a field the next wood is sign-posted by the Estate with a large 'Miz-Maze' pointer. We carried on to the left of Miz-Maze Wood and Giants Grave is in the field behind. For Hampshire its quite a large barrow. Interestingly the 'mutilation' referred to in 'Hampshire Treasures' actually give it a horn-work feel, like a Cotswold Severn a la Belas Knap.
The fantastic 'Hampshire Treasures' resource gives the following info – "Giants Grave', Breamore Down . Long Barrow - SU138200 - Originally 65m. long and 26m. wide with flanked ditches. Now partly mutilated. No trace of ditches due to ploughing. Scheduled Ancient Monument no.35" Referred to in Pevnser's guide to the "Buildings of England; Hants. and I.O.W"