In February, ACD were contacted to investigate the integrity of a Sweet chestnut tree in Henley-upon-Thames that had a Tree Preservation Order. The tree owner was concerned about the health of the tree after she noticed three woodpecker holes on the stem, as well as a branch failure from further up in the crown. A basic internal decay investigation was carried out using an increment borer to determine the structure and strength of the internal wood. On investigation, no significant decay was detected. The woodpecker holes were no deeper than 80mm and did not lead to the central column of decay as initially suspected. A nylon hammer was also used to sound the timber on the stem, which was also deemed to be in good condition. It was determined that the risk of stem failure was low and that no remedial work would be required. It was not possible to conclude exactly why the branch failed, as the branch had already been cleared away by a tree surgeon prior to our arrival. However, the tree showed good signs in relation to occluding wounds caused from historic branch removal, showing that the tree was in relatively good health.