Frosted Bottle Brush.
Frosted bottle brush all I think you can do is wait and see.Come spring it may well start sprouting again.You could possibly protect it now with horticultural fleece, however the worst of the damage has probably been done.In the spring the way to tell where there is live wood is to start at the tips and scratch back the bark with your finger nail.If the wood is green then you know that you have live wood if it is dull – then the wood is dead and you can cut back that bit.Alternatively you can leave until you see new growth and cut back to that point.