An offshore structure comprising: a main structural tube having a longitudinal axis and comprising an open-ended lower end whose peripheral edge is adapted to cut into the sea bed as the offshore structure is driven into it; and a plurality of stabilisers each comprising: a main body portion forming a hollow interior volume and having an open lower end whose peripheral edge is adapted, in use, to cut into the sea bed, whereby in use, a trapped volume of fluids is retained in the hollow interior volume between the main body portion and the sea bed; an outlet communicating with its respective hollow interior volume; and a control means to control, in use, the egress of the trapped volume of fluids from the hollow interior volume of each respective stabiliser; wherein the geometric centres of the hollow interior volumes of the stabilisers are radially offset from the longitudinal axis of the offshore structure; the offshore structure being characterised by: a diaphragm separating a foundation portion of the tube from a main leg portion of the tube; a tube flooding valve and a control means adapted to open the tube flooding valve on a flood tide, and to close it on an ebb tide, such that a water level within the main leg portion is maintained at a level equal to or higher than the instantaneous sea level (202"); whereby the head of fluids within the main leg portion of the tube drives, or facilitates driving, the offshore structure into the sea bed. a main structural tube having a longitudinal axis and comprising an open-ended lower end whose peripheral edge is adapted to cut into the sea bed as the offshore structure is driven into it; and a plurality of stabilisers each comprising: a main body portion forming a hollow interior volume and having an open lower end whose peripheral edge is adapted, in use, to cut into the sea bed, whereby in use, a trapped volume of fluids is retained in the hollow interior volume between the main body portion and the sea bed; an outlet communicating with its respective hollow interior volume; and a control means to control, in use, the egress of the trapped volume of fluids from the hollow interior volume of each respective stabiliser; wherein the geometric centres of the hollow interior volumes of the stabilisers are radially offset from the longitudinal axis of the offshore structure; a main body portion forming a hollow interior volume and having an open lower end whose peripheral edge is adapted, in use, to cut into the sea bed, whereby in use, a trapped volume of fluids is retained in the hollow interior volume between the main body portion and the sea bed; an outlet communicating with its respective hollow interior volume; and a control means to control, in use, the egress of the trapped volume of fluids from the hollow interior volume of each respective stabiliser; wherein the geometric centres of the hollow interior volumes of the stabilisers are radially offset from the longitudinal axis of the offshore structure; the offshore structure being characterised by: a diaphragm separating a foundation portion of the tube from a main leg portion of the tube; a tube flooding valve and a control means adapted to open the tube flooding valve on a flood tide, and to close it on an ebb tide, such that a water level within the main leg portion is maintained at a level equal to or higher than the instantaneous sea level (202"); whereby the head of fluids within the main leg portion of the tube drives, or facilitates driving, the offshore structure into the sea bed. a diaphragm separating a foundation portion of the tube from a main leg portion of the tube; a tube flooding valve and a control means adapted to open the tube flooding valve on a flood tide, and to close it on an ebb tide, such that a water level within the main leg portion is maintained at a level equal to or higher than the instantaneous sea level (202"); whereby the head of fluids within the main leg portion of the tube drives, or facilitates driving, the offshore structure into the sea bed.