Wills question

[Pericombobulations]

I typed a really long post but basically I want to know, if I can future proof myself against claims from siblings as they think I am spending our parents money and worry they will try to prevent me getting anything from our parents wills.

I think you need the lost long post again.
Are your parents of full mental capacity?
If so, it's their business what they give you now, and what they leave you in their wills - which means the best future proofing they can do is make sure those are written properly.
If your parents were giving you a lot of money now and still intended you to have an equal share of their estate on death, they could include with their will an expression on wishes that made it clear that this was fully intentional.

I think you need the long post. Depends what you're spending, and why they think they'd have a claim on it.