Certainly not Rhodo – the buds are all wrong… Rhodos have big fat buds at the end of the branch, usually pink/red in colour, the buds on this are too small, at the leaf joins instead of the end and too white to be Rhodo.
It is some variety of Laurel (Prunus laurocerasus), but maybe not Common Laurel as the leaves look too slim. Could be Prunus lucitanica?
EDIT – Actually really good as a hedge if you can get it under control, but be careful of cutting if back into bare wood initially. If you really need to hack it back heavily do one side at a time, so that it has chance to recover. Once it is under control then just as Crankboy say above.