Void former

A void former system comprising:

• a plurality of void former units, each void former unit suitable for forming a void in a concrete element and each void former unit comprising:
• a first void former element, the first void former element comprising a first surface and at least one first opening in the first surface;
• and
• a second void former element, the second void former element comprising a second surface opposite the first surface and at least one second opening in the second surface, each second opening corresponding to a first opening in the first surface, wherein the first void former element and the second void former element are connected to form a passage between each first opening and its corresponding second opening, and a void space surrounding the or each passage, and further wherein the void former unit is modular in shape to allow for multiple, void former units to be connected together,
• wherein the concrete void former units are connected together provide a substantially continuously extended:
• first surface;
• second surface, and void space extended between the extended first surface and the extended second surface, across multiple void former units,
• wherein each of the plurality of void former units are detachably connected to one another, and
• wherein the plurality of void former units are detachably connected by an interlocking mechanism.