Thank you so much for the fast reply.
I'm annoyed with myself because I tried using .pinnedContainer (after reading one of your replies the other day) but only applied it to the first one!
Thanks for the other solution too. My issue with that is that the site I am working on allows the user to choose some preset background colours, which applies a class to the 'module'. Then I use those classes as adjacent sibling combinators, to alter spacing, key lines, etc... (nightmare!), so wrapping them will cause issues with that.
But the first option works great! Thank you again!