A spinal system comprising: - a lamina plate assembly (1000, 1100, 1100a, 1100b, 1100c) comprising: - a first plate member (1014, 1114, 1114a, 1114b, 1114c) comprising a first foot (1034, 1134, 1134a, 1134b, 1134c), a first intermediate portion (1041, 1141, 1141a, 1141b, 1141c) and a first hinge portion (1054, 1154, 1154a, 1154b, 1154c); and - a second plate member (1018, 1118, 1118a, 1118b, 1118c) comprising a second foot (1036, 1136, 1134a, 1136b, 1136c), a second intermediate portion (1043, 1143, 1143a, 1143b, 1143c) and a second hinge portion, (1056, 1156, 1156a, 1156b, 1156c) - wherein the first hinge portion (1054, 1154, 1154a, 1154b, 1154c) and the second hinge portion (1056, 1156, 1156a, 1156b, 1156c) are in engagement with one another to create a hinge that adjusts at least one of the width and height of the lamina plate assembly (1000, 1100, 1100a, 1100b, 1100c), characterised in that - the first intermediate portion (1041, 1141, 1141a, 1141b, 1141c) comprises a first elongated window (1016, 1116, 1116a, 1116b, 1116c) and one or more first additional openings (1023, 1123a, 1123b, 1123c) for receiving bone screws therein and the second intermediate portion (1043, 1143, 1143a, 1143b, 1143c) comprises a second elongated window (1018, 1118, 1118a, 1118b, 1118c) and one or more second additional openings (1029, 1129a, 1129b, 1129c) for receiving bone screws therein, and - the one or more first additional openings (1023, 1123a, 1123b, 1123c) are disposed between the first elongated window (1016, 1116, 1116a, 1116b, 1116c) and the first hinge portion (1054, 1154, 1154a, 1154b, 1154c) and the one or more second additional openings (1029, 1129a, 1129b, 1129c) are disposed between the second elongated window (1018, 1118, 1118a, 1118b, 1118c) and the second hinge portion (1056, 1156, 1156a, 1156b, 1156c). - a lamina plate assembly (1000, 1100, 1100a, 1100b, 1100c) comprising: - a first plate member (1014, 1114, 1114a, 1114b, 1114c) comprising a first foot (1034, 1134, 1134a, 1134b, 1134c), a first intermediate portion (1041, 1141, 1141a, 1141b, 1141c) and a first hinge portion (1054, 1154, 1154a, 1154b, 1154c); and - a second plate member (1018, 1118, 1118a, 1118b, 1118c) comprising a second foot (1036, 1136, 1134a, 1136b, 1136c), a second intermediate portion (1043, 1143, 1143a, 1143b, 1143c) and a second hinge portion, (1056, 1156, 1156a, 1156b, 1156c) - wherein the first hinge portion (1054, 1154, 1154a, 1154b, 1154c) and the second hinge portion (1056, 1156, 1156a, 1156b, 1156c) are in engagement with one another to create a hinge that adjusts at least one of the width and height of the lamina plate assembly (1000, 1100, 1100a, 1100b, 1100c), characterised in that - the first intermediate portion (1041, 1141, 1141a, 1141b, 1141c) comprises a first elongated window (1016, 1116, 1116a, 1116b, 1116c) and one or more first additional openings (1023, 1123a, 1123b, 1123c) for receiving bone screws therein and the second intermediate portion (1043, 1143, 1143a, 1143b, 1143c) comprises a second elongated window (1018, 1118, 1118a, 1118b, 1118c) and one or more second additional openings (1029, 1129a, 1129b, 1129c) for receiving bone screws therein, and - the one or more first additional openings (1023, 1123a, 1123b, 1123c) are disposed between the first elongated window (1016, 1116, 1116a, 1116b, 1116c) and the first hinge portion (1054, 1154, 1154a, 1154b, 1154c) and the one or more second additional openings (1029, 1129a, 1129b, 1129c) are disposed between the second elongated window (1018, 1118, 1118a, 1118b, 1118c) and the second hinge portion (1056, 1156, 1156a, 1156b, 1156c).