Thanks guys, but I don't need a mono spaced font (technology has improved). Two of the above fonts don't have the necessary unicode symbols. Anonymous Pro has ugly unicode symbols (I have no idea how a font designer manages to create a set of arrows that have different weights and arrow head designs - but some manage it!).

Note. For differentiation, the vertical line (separation character) should be the only character in the font that is represented as a vertical line. Lower case L should have a small bend to the right at the bottom of the stalk. Upper case i should have cross bars at top and bottom. Digit one should have a small angled bar at the top of the stalk on the left hand side.

The zero character can be narrower than the O, but not have a dot or line though it (to avoid it resembling other symbols).

Thanks for your help :-)