Known to do the job guaranteed = beachy head.
But I would consider the following, assuming you don't want to visit a psych ward, if you plan on going there (from my experience):
- It's ideal to be 100% certain of your decision, so that you would be able to jump soon after reaching the spot. The patrol team will intervene if you look slightly 'suspicious', or even if you are just near the edge. If you can go for a walk to check the area out without looking strange, then that's fine too.
- However, others should not be suspicious that you have gone missing to ctb. Police managed to track me down very quickly, and the history of seeking medical help for mental health issues did not help my case that I had gone there just for a walk.
- Don't go missing or arise suspicion - tell others you're going for a holiday, book the time off work, etc. Sounds obvious but my case was treated with urgency, and my words were not trusted because I was a missing person
There are various other bridges across the country where people have jumped from successfully, however I don't think any of them beat beachy head in terms of it being a sure thing. It's a beautiful place too. Sorry it's come to this and good luck with your decision.