The merger of Cardiff and Bristol approaches.
I would look to it being done from Cardiff not Bristol, the majority of the radar services are already done from there, far less staff would have to be transplanted from Bristol to Cardiff than visa versa, Cardiff has its own radar , Bristol relies on a feed from Clee Hill , Clee Hill radar can not pick up low level aircraft to the west and south of Cardiff
Overall though I think the only way to go however, I'm sure Bristol ATCOs wouldn't mind coming under the NATS umbrella with all the staffing difficulties they have been having.