Switzerland-headquartered offshore pipeline installation, heavy lift, and subsea construction contractor Allseas has added a new decommissioning feat to its book of achievements with the removal of a platform in the Northern North Sea (NNS).

Allseas secured a decommissioning assignment three years ago with TAQA for the removal of the Eider Alpha , Tern Alpha , North Cormorant , and Cormorant Alpha platforms in what was described as the largest single offshore decommissioning contract awarded in the UK to date.