From April 2024 third party ship managers will also be allows to join.

 A UK Chamber of Shipping Spokesperson said:

“Tonnage Tax in the UK  supports over 50,000 jobs in the shipping sector and hundreds of millions of pounds of tax revenue. The opening of an election window, for the first time in nearly two decades, alongside the ability for third party ship management companies to join is welcome news and will provide companies with a long overdue opportunity to join.

“To ensure our Tonnage Tax regime is world leading, attracting further jobs and investment into the UK, we do need to see further reform including greater flexibility around how companies are able to opt into the regime.” 

Further information is available in the Budget documents on pages 87-88.