Cheers all for the answers so far...
My index.html now looks like this:
<script id="sap-ui-bootstrap"
src="https://sapui5.netweaver.ondemand.com/sdk/resources/sap-ui-core.js"
data-sap-ui-libs="sap.m"
data-sap-ui-theme="sap_bluecrystal"
data-sap-ui-xx-bindingSyntax="complex"
data-sap-ui-resourceroots='{"com.test.northwind": "./"}'>
</script>
And my neo-app.json still contains this:
{
"path": "/resources",
"target": {
"type": "service",
"name": "sapui5",
"entryPath": "/resources"
},
"description": "SAPUI5 Resources"
},
The app still works fine stand-alone (although it still throws an error that it can't find sap-ui-core.js, when it obviously can.) However I'm still having issues with it running when embeded within HCP...
Cheers,
G.