For goodness sake @slowingdown1
You are not entitled to UC because you have money available to live on. You are expected to live on it. You will not get UC whilst you have over £16k to live on.
You need to use the money you have to live on. This is not deprivation of assets. That’s just nonsense and no one at CAB told you that.
You cannot give it away, or go out and buy a boat, or go on a few luxury holidays of £20k or anything like that. That would be deprivation of assets.
You can, and are expected to, use it for your normal living costs for as many years as it lasts. If you’re short £1800 a month to cover your living costs then you withdraw that from your savings. You can also withdraw more if you want a take away, or a bog standard family holiday. Anything that would be considered just normal living. You spend your money on that.
You can also pay off your debts (credit cards, overdrafts, etc).
You can pay off the mortgage, but I’d be careful of that. If your mortgage is affordable then I’d rather have some money in the bank than the mortgage paid off and relying on UC maybe
In several years, when you are under £16k in savings, you can apply for UC. You won’t get the full amount until your savings are less than £6k, but you’ll get something once you go under £16k.
It’s ridiculous that you thought you should UC when you have £80k to live off. If your mum didn’t want you living off it then she should have put it in trust for your children. She didn’t, so it’s your money and you need to use it on your living costs.