A boring system including a shaft enlargement arrangement, the shaft enlargement arrangement comprising: a hollow column proximate a lower end of the boring system; a first cutter head that is rotatably fitted to the hollow column, with first drive means being provided to rotate the first cutter head relative to the hollow column so as to bore downwardly a hole having a diameter corresponding substantially to the diameter of the first cutter head, wherein the first cutter head comprises a support body carrying a winged arrangement, the support body being rotatably fitted to the column, the winged arrangement comprising a plurality of wings extending from the support body, each wing being fitted with, or comprising, a plurality of first cutter elements, each wing being angled upwardly and away from the support body, so to define a substantially V-shaped cutting profile; a boring head arrangement fitted to an operatively lower end of the column, the boring head arrangement terminating in a second cutter head, with second drive means being provided to drive the second cutter head so as to bore a leading hole as the boring system proceeds to bore downwardly; and a gripper arrangement fitted to the hollow column, the gripper arrangement being arranged around the column, so as to substantially enclose the column, the gripper arrangement being positioned, in use, below the first cutter head and above the boring head arrangement, the gripper arrangement being arranged to securely grip against the leading hole bored by the second cutter head, so as to secure the boring system in position within the bored hole, the gripper arrangement being fitted to an actuator arrangement secured to the column, the actuator arrangement being operable to move the gripper arrangement axially along the length of the column, to assist in the overall downward movement of the shaft enlargement arrangement. a hollow column proximate a lower end of the boring system; a first cutter head that is rotatably fitted to the hollow column, with first drive means being provided to rotate the first cutter head relative to the hollow column so as to bore downwardly a hole having a diameter corresponding substantially to the diameter of the first cutter head, wherein the first cutter head comprises a support body carrying a winged arrangement, the support body being rotatably fitted to the column, the winged arrangement comprising a plurality of wings extending from the support body, each wing being fitted with, or comprising, a plurality of first cutter elements, each wing being angled upwardly and away from the support body, so to define a substantially V-shaped cutting profile; a boring head arrangement fitted to an operatively lower end of the column, the boring head arrangement terminating in a second cutter head, with second drive means being provided to drive the second cutter head so as to bore a leading hole as the boring system proceeds to bore downwardly; and a gripper arrangement fitted to the hollow column, the gripper arrangement being arranged around the column, so as to substantially enclose the column, the gripper arrangement being positioned, in use, below the first cutter head and above the boring head arrangement, the gripper arrangement being arranged to securely grip against the leading hole bored by the second cutter head, so as to secure the boring system in position within the bored hole, the gripper arrangement being fitted to an actuator arrangement secured to the column, the actuator arrangement being operable to move the gripper arrangement axially along the length of the column, to assist in the overall downward movement of the shaft enlargement arrangement.