Anyone been sterelised in the UK?

Any females been sterelised in the UK or England? I'm in England right now and I'm worried about them refusing to let me get a bisalp. I have very severe tokophobia and I'm afraid of getting assaulted or anything too but I'm not planning on any relationships in the next few years.. I feel like they will reject me if I try to apply.

I also have ADHD however I'm not diagnosed as my dad always told me not to since he thought it would worsen my job prospects.. how did applying for the surgery go for anyone else?