Alan wrote:

Stuart Noble wrote

Some people in our postcode get good freeview reception, and others
don't, so it has to be down to the quality of the aerial

or the tall building just in the line of sight to the transmitter, or
the tree overlooking property, or the.......

The predictions behind the postcode database take what is referred to as
"clutter data" into account, so the effect of large buildings and
groups of trees is to a considerable extent allowed for. As Bob said,
the coarseness of the postcode areas is one of the main limitations.

--
Andy