It is called Gymnosporangium clavariiforme or more common "Tounges of Fire". Around a month ago they popped up all around where I live.
The fungi infects a juniper to form the characteristic "Tounges of Fire" which spread spores. These need to land on a hawthorn as a second host. The spores produced on the fruit of the infected hawthorn then need to find a juniper again and the cycle repeats.