I dashed to the back window, and saw him trotting across the grass. Once again, I lined up a shot, when out of nowhere, our cat, Tigger, leapt at the fox and chased him in circles around the garden. Eventually, he cornered him under the little fruit trees. I was just able to snap this grainy shot, before the fox bounded on top of the fence and down the other side.
Tigger did not pursue.
Although the two never came into contact in this altercation, the fox was sporting a nasty claw wound on its flank (just visible in the photo). So maybe that had met before.