Ha-ha

According to Wikipedia:-

 

'A ha-ha is a recessed landscape design element that creates a vertical barrier while preserving an uninterrupted view of the landscape beyond.

The design includes a turfed incline which slopes downward to a sharply vertical face, typically a masonry retaining wall. Ha-has are used in landscape design to prevent access to a garden, for example by grazing livestock, without obstructing views. In security design, the element is used to deter vehicular access to a site while minimizing visual obstruction.

The name "ha-ha" derives from the unexpected (i.e., amusing) moment of discovery when, on approach, the vertical drop suddenly becomes visible.'

 

Lots of mistletoe in many parts of England this year, it seems to me. Anyone any idea why?

Done