Ok - I think I have it working however there's a few things that I've picked up in the process.
Search Facility
It seems that the search box is only searching page titles. If you search for something that's within the content of a page this won't be picked up. Is there a setting or config that can change this as the content really needs to be crawled and supplied in search pages.
Can't re-search on search page
I've noticed that you can't actually re-search when you're on a search page. This happens with both the search box at the top of the site (in the deliver template) and also the larger search box in the content area. Not sure if this is a bug or done by design?
Menu doesn't work on search page in mobile view
I've noticed that the hamburger menu doesn't want to work in mobile view on the search page. This kind of leaves people stuck if they don't get a page they want from a search query as they can't re-search and can't click on the menu...just click back or the logo to go to the homepage.
In future for bugs like this do you want them posted in the forum or would you prefer them to be added to the Git tracker thingy? (haven't used that yet so will have to look into it :-)