Winter Flowering something or other!!!

So nice to see this in flower. It looks opalescent. It shimmers in the sunlight. Can’t remember what it is called!!
A lovely sunny day today, but still very cold. Very busy when I was walking round the quarry. Too many people. I shan’t go there again at the weekend.

Aha. I think this might be a Viburnum. https://www.rhs.org.uk/plants/articles/misc/winter-flowering-shrubs-for-fragrance