Blue lichen?

I’m used to finding things growing on my logs but this is the first time I’ve come across a royal blue growth. Does anyone know what it is?

A Google search took me to a similar looking photo, taken in USA, describing it as blue lichen.

Thanks to my colleague Mandy Marsh at Natur Cymru I now know that this is terana caerulea sometimes called the cobalt crust fungus or velvet blue spread. According to Wikipedia it was chosen as fungus of the year by the German Mycological Society. It can be used for the creation of an antibiotic.