A system for mounting a plurality of panels, each panel having a longitudinal extent and a cross-sectional profile that together form a front wall extending between two mutually opposite side walls, the front wall facing in a first relative direction and the side walls including longitudinally and transversely extending respective lips which have support surfaces facing in the first relative direction and are spaced apart from the front wall, the system comprising: a carrier part having a length and a width and configured to receive and support the panels at intervals along said length, the carrier part having a carrier face extending in the directions of said length and said width, and having, within the extent of said width, for each respective panel, a pair of engaging surfaces facing in an engaging direction directed inwardly with respect to said width and opposite to the first relative direction of a mounted panel, the engaging surface being for engaging with said support surfaces of the lips of a respective panel; and a locking strip having a length and a width, having a locking face extending in the directions of said length and said width of the locking strip, and having an elongate edge extending along said length of the locking strip; wherein: the carrier part and the locking strip are configured to be mounted to each other with the locking face towards the carrier face and to couple the locking strip relative to the carrier part in a locked position with the elongate edge engaging with the panels so as to engage the support surfaces of the lips of the panels with the respective engaging surfaces; and the system further comprises a mounting arrangement configured to mount the locking strip to the carrier part and to provide movement of the locking strip relative to the carrier part between an unlocked position and the locked position, the mounting arrangement including, on one of the carrier part and the locking strip, a pin, and, through the other of the carrier part and the locking strip, a through hole having an elongate extent extending at least across the width of said other of the carrier part and the locking strip. a carrier part having a length and a width and configured to receive and support the panels at intervals along said length, the carrier part having a carrier face extending in the directions of said length and said width, and having, within the extent of said width, for each respective panel, a pair of engaging surfaces facing in an engaging direction directed inwardly with respect to said width and opposite to the first relative direction of a mounted panel, the engaging surface being for engaging with said support surfaces of the lips of a respective panel; and a locking strip having a length and a width, having a locking face extending in the directions of said length and said width of the locking strip, and having an elongate edge extending along said length of the locking strip; wherein: the carrier part and the locking strip are configured to be mounted to each other with the locking face towards the carrier face and to couple the locking strip relative to the carrier part in a locked position with the elongate edge engaging with the panels so as to engage the support surfaces of the lips of the panels with the respective engaging surfaces; and the system further comprises a mounting arrangement configured to mount the locking strip to the carrier part and to provide movement of the locking strip relative to the carrier part between an unlocked position and the locked position, the mounting arrangement including, on one of the carrier part and the locking strip, a pin, and, through the other of the carrier part and the locking strip, a through hole having an elongate extent extending at least across the width of said other of the carrier part and the locking strip.