This photo was taken late last year, but I have already seen the same fungus this year. The fruits are generally about 2-4 cm long.
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.
I agree that this might be X polymorpha, but I believe it to be very difficult to distinguish that species from X longipes without microscopic investigation (see eg http://www.mushroomexpert.com/xylaria.html). So it might be better to just ID the genus as Xylaria and add the possible species as a comment.
I agree with your comments Martincito and I would have preferred genus only but have still agreed as you said might be.
Lat/Lng: 51.108, -1.816
OS grid ref: SU129343