That is the infamous and invasive Spurge Laurel, Daphne laureola. It seemingly has everything going for it - attractive, evergreen leaves, resistance to pests, drought tolerant, bird friendly . . . . . . . . however it self seeds prodigiously (partly because of birds) and displaces native plants that are more desirable in the environment. It has been compared to Scotch Broom as a threat to local ecosystems; in any case, it is difficult to eradicate once its tenacious tap roots get more than a few inches long. On top of everything else, it is quite toxic and contact to its sap causes skin irritation with some people.
Like other daphnes virus susceptible so a colony can sometimes sicken and die out instead of growing ever larger