BCNorwich
Hi, There are several reasons for the above problem. 
One is that postcodes are areas, not points so routing to a postcode does not take you to a property, it takes you to the highway near the center point of the postcode. Postcodes areas can cover perhaps a square mile. Postcode NR12 7LT is for eleven properties on Hall Lane.
Secondly, the sanctuary seems to be listed with two postcodes, 
"Hillside Animal Sanctuary
Hill Top Farm
Hall Lane
Frettenham
Norwich
NR12 7LT" (from postcode finder which covers the 11 addresses on Hall Lane).
and
"Hillside Animal Sanctuary
Hall Lane
Frettenham
Norwich
NR12 7RW" (from postcode finder which is for only the sanctuary).

The data on OSM is correct.


