Thanks all kindly for the replies. It confirms what I originally thought.
The reason I'm asking is I that in a sim session I once observed, the handling pilot had to repeat a manoeuvre. The reason stated was a loss of three knots at one point in the manoeuvre. It was true they had lost the three knots, however, it was noticed and corrected in a timely and smooth manner. And the rest of the session was all fine, with no points to note.
Now that to me, goes against what the CAA want and what everyone has replied on this thread!
Screwballs