The white lichen was on some vertical asbestos. If you zoom in, I think it is foliose, but confirmation appreciated (now confirmed as crustose!).
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
Lat/Lng: 53.7, -0.5
OS grid ref: TA0429