As you will know, Go-Ahead plc has just been taken over by a consortium of Kinetic, Australia and Globalvia, Spain.

We can just await developments with interest.  For example, this article quotes that They also see opportunities for Go-Ahead to "increase its footprint in the regional UK bus market"

So, could they buy out additional operators or subsidiaries of other groups?  Time will tell.

Go-Ahead sale to Kinetic and Globalvia completes - routeone (route-one.net)