Eni will decommission six platforms in the North Sea.
The 48/29A complex is the main operating hub for Hewett.
Eni has submitted plans to decommission its six platforms in and around the Hewett field in the North Sea.
The Italian operator owns around 90% of Hewett, around 14miles north-east of the Norfolk coast.
Eni plans to completely remove the six platforms before the end of 2028.