Space Cowboy wrote

On the basis that a garden wall is to retain something then it needs to the 1B
thick.

Yes, true, but I was thinking about boundary walls, not retaining walls.

English bond is by far the stronger

Aha - the age-old argument! I remember a tea break on site once when two
brickies were arguing over this and it ended in fisticuffs. The one supporting
English Bond thought the other was being unpatriotic! )

Peter