Looks like a fungal attack - i fear the bush is past saving.

yep, looks like anthracnose or one of the phytophthera root roots, usually caused by overly wet soil conditions. Aucubas don't like wet feet...

Agree, phytophthera, Acuba is particularly susceptible and I would say it's close of play. Fungicides don't seem to sort it out.

Thanks Steragram, Bamboo and Jimmytheone for your advise I would chop it down and replace it with something else

Perhaps it might be a good idea to put perennials or even annulals there for a year or two rather than another shrub, in case whatever killed the laurel is still lurking in the soil.

Yes, dug it up completely including the roots. Yes may put in Lupin as I love plants with flowers not shrub. Thanks everybody for your help