Offshore structure

A method of extending an offshore structure, the offshore structure comprising a main platform supported via a foundation on a seabed, the method comprising:

• providing an extension structure, comprising a platform extension and a platform extension support;
• positioning the platform extension laterally of the main platform;
• and
• positioning the platform extension support, depending downwardly from the platform extension, in contact with the foundation so as to support the platform extension directly on the foundation.

A bearing for permitting rotational and translational movement, the bearing comprising:

• an outer bearing element;
• an inner bearing element having an inner bearing surface and an outer bearing surface;
• and
• a bushing;
• wherein the inner bearing element is provided within the outer bearing element and bears against the outer bearing element along the outer bearing surface, such that the inner bearing element is free to rotate in at least two orthogonal directions;
• and
• wherein the bushing extends through the inner bearing element and the outer bearing element, such that the inner surface of the inner bearing element bears against the bushing on the outer surface of the bushing and can undergo translation motional with respect to the bushing.