With your shiny Ordnance survey map these two barrows should be very easy to find despite the densely packed trees, they are only ten yards from the side of the road and one of the barrows is helpfully massive, three meters high.
The larger of a pair of barrows (see also Nprn306939), 23m NW-SE - 26m in diameter and 3.0m high, truncated by a modern field boundary on the SE.
Upon opening, in 1908, the mound revealed a central collection of calcined human and animal bones, a possibly secondary in-urned cremation and a further deposit of animal bones and sherds.
the lesser of a pair of barrows (see also Nprn306938), greatly mutilated, 16-17m in diameter and c.1.0m high. A NW-SE trench has been driven through the mound.
I would only add, oh the trees, the god damn trees.