Slate

Opted for the slate from C & W Berry – 1,300 should be near enough, allowing for the solar array and the rooflights:

1,300 500 x 250 Matadale Blue Grey Prime Slate (Pre-holed)
+
30 500 x 375 Matadale Blue Grey Prime Slate (Pre-holed, but not, as it turned out)

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First few rows going on

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Another inspection?

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And Tom did some partition while no-one was looking:-

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