After collecting a tiny white fungus from a fallen oak I started to pick apart the tiny bundle at home. There were two mosses (one more than I thought), but more exciting I noticed in amongst them my first ever liverwort. I was so excited that apparently I forgot to write down the species where I could access it from work. However, thanks to the nice BBS bryophyte key I was able to re-ID it this morning.
BBS field guide page
Lophocolea bidentata, Biphid Crestwort