Currently the spec has one section of advice for

1)  ”images that form a single larger picture with no links”

and another section for 

2)  "images that form a single larger picture with links”

However, I think the first section also relates to some situations when the group of images has a link.

The issue is that for the the second sectoin, there is the additional (and ideal) situation that the link for each image slice leads to a different target. But what if  the image is sliced, but the links of each slice lead to the same target? Clearly, then it would be ideal to join the two links to a single link! But what would then be ideal alternative text setup?

Example: Would this better or worse ...

<a href=link><img src=Lorem alt=Lorem><img src=ipsum alt=ipsum></a>

... than the following?

<a href=link><img src=Lorem alt="Lorem ipsum"><img src=ipsum alt=""></a>

Or are they equal?  Of coures, the worse situation is juxtaposing links which points to the same target but which differs with regard to link text/alt text. The advice should say something about this. And it is in that context that it would be useful to clarify that section 1) also applies to situations when juxtaposing images have links which lead to the same target.