Abstract: A spacer element (10) comprises a first engagement portion (12) and a second engagement portion (14). The first engagement portion (12) is arranged to engage in an upper surface of a building block and the second engagement portion (14) is arranged to engage in a lower surface of a second building block. The spacer element (10) comprises two laterally extending arms (16, 18) which project outwardly from the spacer element (10). The laterally extending arms (16, 18) support spacer means in the form of spacer members (20, 22). The spacer members (20, 22) provide an upper contact surface to contact a brick located above and a lower contact surface to contact a lower brick. The spacer element comprises two support members (32, 34). The spacer element (10) provides spacer means which space the next layer of bricks from the lower layer of bricks by a particular distance.

Abstract: The securement member (10) comprises an anchor member (12) and an actuating member in the form of a spreader member (14). The anchor member (12) has an anchor plate (16) which is arranged, in use, to locate underneath at least one brick (18). The spreader member (14) is arranged to locate between a first arm (22) and a second arm (24) provided on the anchor member (12). The actuating member is retained between the first arm (22) and the second (24) such that the actuating member does not substantially spread the arms. The upper portion of the securement member can then be inserted into a recess (28) in order for the upper surface (30) of the actuating spreader member (14) to abut the upper surface (32) of the recess. This abutment causes the spreader member (14) to move relative to the anchor member in order to increase the space between the first arm (22) and the second arm (24).