Just read a thread on another forum regarding large scale deer poaching in Southern England by a gang of hard core poachers. Apparently they have already evaded the police by assaulting an officer and ramming his vehicle off the road to make their escape.
They were using a pick up with a false registration at the time. They have also been known to use a Landrover Discovery.
Information available indicates they are operating from a base close to Portsmouth.
So you guys in Hampshire, Dorset, Sussex and Wiltshire that might be wondering where your deer have disappeared too, this lot might well be the cause.