Is this a lichen?

Is this a lichen?

Observation - Is this a lichen? - UK and Ireland. Description: These greyish structures, which are whiter near the tips, were protruding from a piece of rotting wood on a bank. When pulled off the stems felt quite woody but the ends seemed to shrink fairly quickly. Are they lichen? I cannot find anything similar on a

These greyish structures, which are whiter near the tips, were protruding from a piece of rotting wood on a bank. When pulled off the stems felt quite woody but the ends seemed to shrink fairly quickly. Are they lichen? I cannot find anything similar on any website