Found an old MicroSoft webcam and an Asus EEE pc.
Decided to reuse as a webcam on the back garden.
Tried windows 10, DCAM server and it worked for a while. Computer was running on full CPU then gave up, disk space ran out.
So trashed that, installed Jessie debian, with minimal pckages, Motion, DUC client and the result is...
Instructions to follow.