Just where is St Leonard's in Exeter?

Because St Leonard's is a popular area of Exeter to live in, estate agents in the city use the name with a certain wildness.  But this week I found a splendid howler for a property described as "St Leonard's edge"

Lying just over a mile to the south of the city centre, King Henry's Road is a cul-de-sac location made up of substantial Staverton built properties built in the mid 1930s. Set just off Topsham Road, it lies on the western side of St Leonards, arguably Exeter's premier residential neighbourhood.

The map has a red pointer which shows where King Henry's Road is.  Generally, St Leonard's is considered to be bounded by the river, Barrack Road on the east, the B3183 to the north and Western Way to the west.  So, if the house above is on the western side of St Leonard's, then most of St Leonard's should be off the map to the east.  And does this road really lie to the south of the city centre, marked by the cathedral on the upper left of the map?

Question - should an estate agent be expected to know which is east and which is west?  And which direction is south?