People interested in this subject should read the "Sign Design Guide" published by the JMU and the Sign Design Society. It recommends the following good practice, to assist the 1.97 million people in Gt.Britain with significant sight loss.

The main recommendations for signs are:

• A clear typeface.

• Use of Capital and lower case letters, using Capitals for the first letter of the first and key words.

• The use of contrasting colours - a contrast between signboard and its background and between letters and the signboard.

• The use of white letters on a dark matt background.

• Adequate space between letters and lines and around the words of a sign.

• Text aligned to a left hand margin except with arrows pointing to the right.

• The use of embossing for symbols (including safety symbols) and characters, with characters raised 1 to 1.5mm from the background

• The use of Braille directly below the message with a locator on the left hand edge.

• Braille should be with rounded Braille dots without a raised frame or border.

• Grade 1 Braille should be used for single words and Grade 2 for longer descriptions or sentences.

• The use of audible signs.