A protection assembly (100, 138) for protecting a wall, the wall being one of: a sheet pile wall and a combined wall including sheet piles, the wall being elongate in a horizontal direction and having a non-planar profile such that an outer surface of the wall includes at least one of angles and changes in cross section, the protection assembly (100,138) comprising: a coating system for coating a portion of the wall; a flexible covering (50, 124) for covering the coating system, and having fixing portions at end regions of the flexible covering; and a wall anchor system, wherein, in use, the coating system is located between the flexible covering and the wall, the flexible covering is anchored, at the fixing portions, to the wall by the wall anchor system; characterized in that the fixing portions are anchored to the wall at spaced apart locations in the horizontal direction; and the coating system is shaped so that the flexible covering (50, 124) follows a generally convex path between the fixing portions, wherein the coating system includes: a barrier material layer that is applied to an outer surface of the wall in use; and a shaping layer disposed under pressure between the barrier material and the flexible covering (50, 124), the shaping material having a first side that faces the wall in use and an opposing second side that is covered by the flexible covering (50, 124) and that defines, between the fixing portions, a generally convex curve different from the wall profile, wherein the first side of the shaping layer follows the non-planar profile of the wall and accommodates the angles and/or changes in cross-section in the outer surface of the wall, such that the shaping layer is shaped to remove voids between the flexible covering (50, 124) and the barrier material, and wherein the wall anchor system is operable to apply tension to the flexible covering, so the flexible covering (50, 124) is in hoop tension and produces a force to press the coating system against the wall. a coating system for coating a portion of the wall; a flexible covering (50, 124) for covering the coating system, and having fixing portions at end regions of the flexible covering; and a wall anchor system, wherein, in use, the coating system is located between the flexible covering and the wall, the flexible covering is anchored, at the fixing portions, to the wall by the wall anchor system; characterized in that the fixing portions are anchored to the wall at spaced apart locations in the horizontal direction; and the coating system is shaped so that the flexible covering (50, 124) follows a generally convex path between the fixing portions, wherein the coating system includes: a barrier material layer that is applied to an outer surface of the wall in use; and a shaping layer disposed under pressure between the barrier material and the flexible covering (50, 124), the shaping material having a first side that faces the wall in use and an opposing second side that is covered by the flexible covering (50, 124) and that defines, between the fixing portions, a generally convex curve different from the wall profile, wherein the first side of the shaping layer follows the non-planar profile of the wall and accommodates the angles and/or changes in cross-section in the outer surface of the wall, such that the shaping layer is shaped to remove voids between the flexible covering (50, 124) and the barrier material, and wherein the wall anchor system is operable to apply tension to the flexible covering, so the flexible covering (50, 124) is in hoop tension and produces a force to press the coating system against the wall. a barrier material layer that is applied to an outer surface of the wall in use; and a shaping layer disposed under pressure between the barrier material and the flexible covering (50, 124), the shaping material having a first side that faces the wall in use and an opposing second side that is covered by the flexible covering (50, 124) and that defines, between the fixing portions, a generally convex curve different from the wall profile, wherein the first side of the shaping layer follows the non-planar profile of the wall and accommodates the angles and/or changes in cross-section in the outer surface of the wall, such that the shaping layer is shaped to remove voids between the flexible covering (50, 124) and the barrier material, and wherein the wall anchor system is operable to apply tension to the flexible covering, so the flexible covering (50, 124) is in hoop tension and produces a force to press the coating system against the wall.