Nobody steps on the join between the step and the sill.
Build the step about 4" or so away and buy a bit of drainage channel with a grating that you can fit between step and building
It's about 115 from step to wall (so to speak)
It's roughly square.
You could bed it on dabs of mortar or even chuck the plastic part and just use the top to stop leaves etc falling into the gap. It shouldn't get stepped on given it's position so could just sit on a bit of galvanised metal that sticks out from the step but doesn't actually touch the house? Your sill overhangs by about 1-2"
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