The only reason to visit Barranisky is as part of your Local 100 hills - the torture necessary to reach the top is outlined on the hill page, but here, I think, is the first track.
Various visitors, most recently eamonoc, have commented on the expanding vegetation; indeed it was eamonoc's recent comment that it might be inaccessible in a couple of years that pushed me to visit.
The route is clear enough, but a couple of points to emphasise:
1. At the cottage T25533 79336 - the entrance to the gorse track is DIRECTLY opposite the gable of the house - the gorse is pretty high here, but go through you must.
2. The track stops after 300m - stops Dead - drop to your hands and knees and crawl through, tending right.
3. People have been here before!!!! The route is not easy but it is generally obvious - follow it - half hands and knees - half crouch.
4. The trig is nestled in gorse and can only be approached from your direction - the fact that it is can be reached at all is only because others have been there.
Simply retrace your steps!