The development involves four oil and gas fields, together with offshore and onshore facilities used for extracting, transporting and processing the reserves.

In addition to mobilizing the Seabed Worker DPII diving support vessel with an air diving and nitrox surface demand diving spread, FMDS installed two work class remotely operated underwater vehicles (ROVs), a pipeline hydrographic survey facility and the James Fisher Hydro-Digger for survey and remedial works.

The works involved the hydrographic surveys and mooring integrity surveys.

Offshore operations at Liverpool Bay are focused on the Douglas complex, a facility that monitors and controls the development’s three satellite platforms at Lennox, Hamilton and Hamilton North, with oil and gas from all four fields being sent to Douglas.

The Lennox and Douglas fields produce oil, which is sent via a pipeline, to the offshore storage installation before being loaded into tankers for global exports.

Total recoverable reserves in Liverpool Bay are currently estimated to be in excess of 150 million barrels of oil and 1.2 trillion cubic feet of gas.

Hamilton, Hamilton North and Lennox, produce the gas, which is part-processed on Douglas before it is sent through pipeline to the Point of Ayr gas terminal on the north-Wales coast.