My mum won’t let me go out on my own because she says she doesn’t trust me

So I’m 18 and I want to go to this like event/party on Saturday, and I told my mum I’m going and she said no I can’t go?? It’s in another town 20 miles away so I would have to either get the bus for 1.5 hours each way, or get the train for 30 minutes each way. It’s literally from 3:30pm to 8pm, not even in the middle of the night. I’ll literally be home latest at like 9:30?? She says she doesn’t trust me enough to be going that far on my own, and I’m annoyed bc I bought a ticket to go which she says is my fault for not asking first. But also I’m literally planning on moving like 150 miles away for university in September, so I don’t even understand how me going 20 miles away for one afternoon is a bad thing?? What does she expect to happen in September? I’m so confused.

Go. You've bought the ticket.
What's she gonna do? Throw you out of her home? Hit you? Shout and scream at you? Give you no supper?
You're 18. It would be unlawful imprisonment if she were to physically prevent you from going.
There's no point in talking about this logically with your mum.
Talk about it emotionally. Tell her you love her a lot and you respect her. And give her a hug. And still go.
The train sounds like a better bet. It's quicker.
And make doubly sure you do move out of her home in September.
Your mum can say you can't go till she's blue in the face. It's not her choice. It's your choice. You're an adult now.
If your relationship with your mum gets worse because of this, so be it. Any mum worth having a relationship with, would forgive their offspring for growing up and acting independently.

Re: she say`s she doesn`t trust me > borrow a baby from somebody durin the week - show that you are trustable get that idea in her head and keep it there

Go. You've bought the ticket.
What's she gonna do? Throw you out of her home? Hit you? Shout and scream at you? Give you no supper?
You're 18. It would be unlawful imprisonment if she were to physically prevent you from going.
There's no point in talking about this logically with your mum.
Talk about it emotionally. Tell her you love her a lot and you respect her. And give her a hug. And still go.
The train sounds like a better bet. It's quicker.
And make doubly sure you do move out of her home in September.
Your mum can say you can't go till she's blue in the face. It's not her choice. It's your choice. You're an adult now.
If your relationship with your mum gets worse because of this, so be it. Any mum worth having a relationship with, would forgive their offspring for growing up and acting independently.

So I’m 18 and I want to go to this like event/party on Saturday, and I told my mum I’m going and she said no I can’t go?? It’s in another town 20 miles away so I would have to either get the bus for 1.5 hours each way, or get the train for 30 minutes each way. It’s literally from 3:30pm to 8pm, not even in the middle of the night. I’ll literally be home latest at like 9:30?? She says she doesn’t trust me enough to be going that far on my own, and I’m annoyed bc I bought a ticket to go which she says is my fault for not asking first. But also I’m literally planning on moving like 150 miles away for university in September, so I don’t even understand how me going 20 miles away for one afternoon is a bad thing?? What does she expect to happen in September? I’m so confused.

So I’m 18 and I want to go to this like event/party on Saturday, and I told my mum I’m going and she said no I can’t go?? It’s in another town 20 miles away so I would have to either get the bus for 1.5 hours each way, or get the train for 30 minutes each way. It’s literally from 3:30pm to 8pm, not even in the middle of the night. I’ll literally be home latest at like 9:30?? She says she doesn’t trust me enough to be going that far on my own, and I’m annoyed bc I bought a ticket to go which she says is my fault for not asking first. But also I’m literally planning on moving like 150 miles away for university in September, so I don’t even understand how me going 20 miles away for one afternoon is a bad thing?? What does she expect to happen in September? I’m so confused.