Dunnock

This wee bird has taken to sitting on a Ceanothus branch in our garden, and shouting out shrilly for long periods of time.  I wonder if there is a nest close by and that it might also be warning off local cats?  I am newish to bird appreciation but think this is maybe a Dunnock, am I correct?
Weather looks like it is going to be good today.  'M' is coming back from uni, he has finished his degree now, which is hard to believe.  I think the house will be over whelmed with bags, boxes and more.