Account for a vulnerable adult

[Thornyrose7]

My brother has approx. £17,000 owing to him from an inheritance. He has learning difficulties, so he has issues with money and this would overwhelm him. My sister and I have agreed to open an account and give him the money over time and pay for the things he needs.
I am wondering what the best set up should be. It would need to be a joint access account for me and my sister. I first thought a Trust, but my sister doesn't think so. I think we would need easy access to the money in case of emergencies. I don't want the money to cause tax problems for us or benefit problems for my brother.

Can anyone advise?

Many thanks.
Can anyone advise

Not sure about the bank account issue but:
If he has over £16,000 in savings any means tested benefits he is on will stop until he gets below that amount. Then the reduction is worked out on a sliding scale.
You are expected to pay living costs, rent etc out of this money. If he is on PIP or contribution based benefits they will not be affected.

Thanks so much for your reply and the info.

My cousin is a trustee for her brother who has a lot more held for him. She has to request permission to spend money do there must be more trustees. I know it was complicated because it's not just the benefits it's the access to services etc that they give you.