In message , R D S writes
I'm about to buy some broken slate for our front yard.

It's just occurred to me that about 18 months ago when we had the
kitchen roof sorted the roofer replaced 50 slates.
I never thought to keep them, but now.....

Conversely, I have several piles of second hand slate from my last
roofing job not touched in 15 years. Along with the soft red brick and
stable pavers.

One of us is a Squirrel!
:Facepalm:

--
Tim Lamb