Caution urged as the deadliest month for New Forest animal accidents approaches As the nights draw in, drivers using New Forest roads are reminded that animal accidents increase in the lead up to Christmas, with November being the deadliest month for livestock. Commuters are urged to be vigilant as accidents involving animals in the Forest peak between 5pm and 8pm on weekdays in the winter months. They are also being encouraged to slow down from 40mph to 30mph, a move which a