On Thu, 12 May 2016 13:01:45 +0100, tim... wrote:

But market forces having settled on a rectangular (not square) slice
size/shape that seems to have been constants for much of my lifetime,

Really?

None of the bread we have is "rectangular".

I was ignoring the curve at the top

The point I was making is that it isn't square, but has one dimension
longer then the other

and IME

the long dimension won't fit in the toaster whichever way you try

Right, and? The last loaf I bought was sort of roundish, with tucked-over
bits at the top in all directions. The one before that was fairly long
and thin.

Maybe you're just buying **** industrial "bread". Does it come in a
plastic bag?