Disclosed is a clamp for securing a panel along its edge such as for a fence or glass balustrade to more effectively locate and retain the panel sheet. The clamp comprises a first clamping part comprising a first compressible elastic packer; a second clamping part comprising a second compressible elastic packer; and an elongate locating component. In use, the elongate locating component is movable lengthwise into a clamping position in which the locating component extends at least approximately parallel to an edge of a panel clamped in the clamp and through the first and second clamping parts. The first and second clamping parts abut each other on a first side of the locating component; and on a second side of the locating component the panel is clamped between the first and second clamping parts with the first and second packers pressing against opposing sides of the panel. The elongate locating component is tapered lengthwise and when in the clamping position bears against conical surfaces of the first and
