Problems with images and text

I am trying to insert images within a long page and have text below the image (in a separate paragraph underneath), not wrapped around it. Everything I’ve tried so far wraps the text around the image. In the visual editor I try to leave a line break by pressing enter and saving, no difference. I go into the html and try to add at the end of the image code, doesn’t work. Try to add and </br> around the image code, still not.

Any idea? Do I need to change something in the stylesheet?

Thanks
Nick