Flat indicator signs requirements

All floor identification signs should be supplemented by flat indicator signs, which provide information relating to the flats accessed on each storey. The flat indicator signs should meet all of the following— (a) The signs should be sited immediately below the floor identification signs, such that the top edge of the sign is no more than 50 mm below the bottom edge of the floor identification sign; (b) The wording should take the form Flats X-Y, with the lowest flat number first; (c) The text should be in sans serif typeface with a letter height of at least half that of the floor indicator sign; (d) The wording should be supplemented by arrows when flats are in more than one direction; (e) The text and arrows should be on a contrasting background, easily legible and readable in low level lighting conditions or when illuminated with a torch.