Welcome to the forum Kumarik, I'd agree with Jerry it does look very much like a fake £1.
Just to let you know, you have posted your reply as a Report so it hasn't shown on the thread.
Kumarik's response;
Thank you very much for a good answer. I also think looking at this coin, it comes from the concrete mixer. But since we did not find any information (I'm from Ukraine), I thought that the British coin collectors must know everything about British coins. Thank you