A report in September noted the RAF was potentially looking to sell off its BAE 146 transport fleet. See:

https://ukdefencejournal.org.uk/raf-to-sell-bae-146-transport-aircraft-fleet/

In today's Sunday Telegraph Business & Money Section Alan Tovey writes - in an article entitled 'Build Royal Family jets in UK, say MPs' - that the Ministry of Defence (MoD) is said to favour replacing the 146 fleet with Bombardier Global 5000 jets although Airbus is positioning itself to offer the A220 (the wings of which are built in Belfast).

Refer:

https://www.planelogger.com/Aircraft/Registration/ZE700/423136

https://www.planelogger.com/Aircraft/Registration/ZE701/423209

https://www.planelogger.com/Aircraft/Registration/ZE707/424228

https://www.planelogger.com/Aircraft/Registration/ZE708/424361