Abstract: An advertising panel (20) which can be used to selectively attach advertisements to the side of a road vehicle (10) or to a fixed structure in a readily demountable manner comprises a sheet (22) of plastic material, the sheet having an image applied to a first side of the sheet. An elongate fastener (22) having a thickness greater than the sheet extends along a longitudinal edge of the sheet. The elongate fastener (22) engages with one or more slotted track members (30, 32) provided on a wall (16) or curtain (14) of the road vehicle. The track member and slot (36) may be provided in a continuous length (32), corresponding to the length of the longitudinal edge, or in discrete sections (30), which are particularly applicable for use with a curtain. Elongate fasteners (22) can be provided on the upper and lower edges of the panel (20), so that the panel is installed by threading it horizontally into the slots (36) of upper and lower track members (30, 32) simultaneously.