To have a unity government requires that the existing government is replaced. Could present a problem if they do not wish to go. Meanwhile tickety tock.
This is of rather more concern than the closure of an uncompetitive shipyard. After all closure is hardly a new event.Harland & Wolff established shipyards at Bootle in Liverpool, North Woolwich in London and Southampton. However, these shipyards were all eventually closed from the early 1960s when the company opted to consolidate its operations in Belfast.
The joint administrators of Harland and Wolff.had this to say:

"Founded in 1861, the Belfast-based company has in recent years specialised in wind energy and marine engineering projects.

"After a long sales process, in which a buyer could not be found, the business has been unable to continue trading due to having insufficient funds following the recent insolvency of its ultimate parent. This was Norway's Dolphin Drilling that according to the Financial Times filed for bankruptcy back in Jun 26, 2019.
No widgets and no cash = no company. The unions can sit in as much as they like, it will change nowt.