Overriding the root Layout export when using nested directory based routes

[sgcullen]

I'm new to setting up routing in remix and have read through the docs but I'm getting a bit held up with routing.

I've opted to go down nested directories as I feel that the hierarchical nature of it will map nicely to url hierarchy as the app grows and be easier to maintain but I'm struggling with layouts.

I have a default exported layout in the root.tsx which is fine but I want to override this default exported layout for some of the nested directories.

Any tips here much appreciated!