Hi Malcolm

No, it's about unusual features or inferences that don't require a formal alert.

See NZB Manual D62   section 29.7

Delayed Alerts:When the auction is over, alert any self alerting bid that may have an unexpected or unusual meaning unless a meaning has already been requested by an opponent. (Crockfords Bridge)

I should have read this first, I had thought a delayed alert was one where partner had not alerted when an alertable bid was made.... I have yet to experience a delayed alert in practice, and would have been at a loss if called as director.

Thanks Giles

Some examples :

Agreements above 3NT that aren't alerted at the time to avoid UI between the bidding pair.

e.g.  Kickback, Minorwood, Gerber CRO, Pick-a-Slam, etc 

Unusual doubles

e.g.  DOPI / ROPI ;  DEPO / REPO (?)

e.g. a redouble of a lead-directing double to show a control (?)

Note that the delayed alert is only by Declarer or Dummy.   Defenders keep quiet until after the play.

Hi Giles

I should rephrase my answer to my post. Yes, I have experienced delayed alerts, know who should make them and when as per 29.7 and am comfortable to advise on that as a director. It is the small plus sign on the bidding pad to indicate one as per 29.8 that I have yet to experience. I would not know how to rule should a player do that, i.e. at what time can/should that get done? It certainly does not appear to be common practice, but delayed alerts are rare as well.

Thanks Malcolm