Correcting Course Heights

[BadgerBadger]

I have a slight issue where part of my substructure coursing heights are slightly out.  I can correct it by laying the first course on a 40mm mortar bed, is this too thick?

 

I would prefer to correct it in the first course, as it's getting close to being visible above ground, so just wondering what my alternatives might be? 

[MikeGrahamT21]

Id say 40mm is too much personally. How about some kind of detail before you start above DPC? Maybe slate? Terracotta? Not entirely sure what would be suitable from a compressive strength POV.

[Onoff]

Cast a concrete ring beam, 40mm high?

[Mr Punter]

Slate is pretty good.  For 40mm you may need 2 layers but probably 1 will work.

[Canski]

Brick on edge = 112 mm normal brick course 75 mm there’s 37 mm just bed up the BOE 3 mm and you’re there or use a split block if it suits. 

[Radian]

Concrete coursing slips are 40mm if that helps?