I noticed this Slime Flux growing on a Sycamore at Carlisle Park Morpeth. I first noticed this on a Horse Chestnut at Ulgham in April 2011. There were no lasting affects on the tree. This strange sighting is caused by the sap fermenting though a mixture of bacteria and fungi. This was only identified at Kew in 2006 and reported in Field Mycology the same year.