Is it possible to create a web scene using BNG as basemap?

[GeorgiaRoberts1]

I am trying to add LiDAR WMS data from data.gov.uk into a 3D web scene in ArcGIS Enterprise 10.5. The LiDAR data's coordinate reference system is in British National Grid. This seems to be unsupported in web scenes. Can you confirm if this is possible?

Thanks

Georgia

[JackCurran]

I'd also like to know the answer to this, as I'm currently having to reproject everything to WSG84, which results in less accuracy...