Climacium dendroides

Climacium dendroides

Observation - Climacium dendroides - UK and Ireland. Description: I think this is a moss but I can't find anything like it in any of my sources. It was growing beside a rock outcrop just behind coastal dunes. Can anyone help with an ID, please? Edit: title changed to match Sara's ID - many thanks.

I think this is a moss but I can't find anything like it in any of my sources. It was growing beside a rock outcrop just behind coastal dunes. Can anyone help with an ID, please?
Edit: title changed to match Sara's ID - many thanks.