Bearah Tramway cairn

Don’t know how I have not gone looking for this one before....walked the area loads of times. Marked as a cairn on OS maps, this little cist is hidden under a gorse bush beside the old tramway that runs west from Bearah Quarry.
Apart from the capstone there is very little above ground...hardly a cairn in the Bodmin Moor scheme of things.
Too dark and too small to take a look inside so had to rely on the camera to get a photo. It looks very tidy inside with banding on the stones suggesting where the earth/water level once was?