I've just found a whole Skimmia bush, about 1m high, almost completely hidden inside a huge clump of Pernettya. If you peek through the branches in one particular direction, you can just see a branch with a cluster of flower buds.
I now have to decide which I prefer - the Pernettya with its huge cluster of white berries, which will remain on the bush almost until next year's berries arrive; or the Skimmia with its scented white flowers in spring and red berries in autumn.