I have this Johnson Bros Old English gravy boat with the small rose and gold pattern and I haven't been able to find it's value. Any help?

Is that gravy boat also supposed to have some sort of plate to go with and under it?

I did find lots of examples of Johnson Brothers china on the following image search. It's possible that you might find that same pattern there. Also, even if you don't, there are comparable items to yours listed. There are also probably some prices listed.

Johnson Bros Old English gravy boat - Google Image Search

Or try here:

Johnson Brothers at Replacements, Ltd