See i edited my reply after you replied. The point is, at some point, govia are intertwined with southeastern and since they have been the service has gone to ****Other way round as I just said
Govia is owned by Keolis and Go-Ahead and Go-Ahead operate Southeastern, hence Southeastern and Govia are unrelated because Govia is run as a separate business to Go-Ahead due to its part involvement with Keolis.