Hey, I can give you all some insight having been to Beachy Head back at the beginning of March to jump off myself.
I would advise against going to Beachy head.
When you get to the edge, it's the scariest thing ever. You won't be able to do it, you look down the edge of the cliff and you'll realise you can't. If you do manage to, it will be painful - it's possible you'll hit the side of the cliff on the way down, and if not, you'll just be shit scared all the way down. You don't know fear until you stand on the edge of that cliff.
So what will happen when you're too scared to jump off, and you're sighted by a passer by, or the patrol, or anyone? Simple, you'll be taken by the police under section 136 of the mental health act. You'll be assessed by a bunch of haughty and arrogant psychiatrists. They'll section you. I was sectioned under section 2, meaning they can hold you for up to 28 days. You'll be taken to a psychiatric ward attached to your NHS district (e.g, if your GP is in Oxford, you will be transported to an Oxford psychiatric ward in a Serco type ambulance- however this may not be the case in the context of covid - they may have to put you in the least populous psychiatric ward available and minimise travelling distance, putting you in a closer ward, I dont know,).
They'll then contact your 'nearest relative' - to find out who this is, google it - in my case it was my mother. You have no control over this process - they will contact your next of kin, be that your mother, father, wife etc whether you want them to or not- you haven't got a choice. This may however help you, depending on what your nearest relative is like. My parents have an inherent distrust of institutions, and relatives are given lots of rights in this process - this means that if your parents want you out of the ward, it's much easier to get out. Section 2 means they can hold you for up to 28 days, whereas I was, I believe, taken in under section 136 on the Monday, and released by the Thursday - all because I said I was better, and my parents requested my release.
My point is, going to beachy head will not help you. Either you will end up in terrible pain, or you will fail, and end up in a psych ward, possibly for a long time. This could effect a number of things in your life.
Beachy head is not worth it. I'd advise you against it.