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Apparently raw oats are really hard to get hold of as most commercially produced oats are heated before we buy them, this is from Wiki:
"The unsized oat groats pass through a heat and moisture...

I use Oh She Glows overnight oats all the time!

I think the Overnight bit is partly the Chia seeds which can take time to swell (which thickens the oats) and also because it makes rushing around...