The tree was planted in a bed, presumably some sort of ornamental species.
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.
At present there is Rust on Black Poplar, Salix lapponum, S. alba, S. caprea. I haven't noticed any on Aspen.
Lat/Lng: 53.7240761, -0.185493
OS grid ref: TA198268