I saw this movie when I was kid, I think it was made in late 80's or in the beginning of 90's. It's full-lenght animation movie and if I remember right, the story was located to England/London. There was a young girl (maybe with a dog?), wizard and ugly trolls. I remember one scene, where wizard was catching shooting stars with a net and putting them in bottles.
I mentioned trolls (I think they were called by that name in the movie, not orcs or goblins), which were the bad guys of the movie. They were very tall and ugly. In the end of the movie they were stunned to eternal sleep and fled away with choppers.

The movie wasn't made like "disney-style"; it was more realistic.

I only need a name of this movie, but it doesn't pop to my mind :D

Well, to me this sounds like a film similar to one called "The BFG" which was set in London and featured a girl called Sophie and a giant who went around catching dreams in a net and bottling them. The other giants weren't so pleasant and would eat the children. In the end, Sophie and the BFG (big friendly giant) go and see the Queen and the helicopters are called which fly over the other giants when they're asleep and capture them and put them in a pit.

Hope this is the one :)