Standard spotify account will it work with NDS

I think the Naim streamers all require Spotify Premium, not just the standard. (I'm not a Spotify user, though.)

Gavin is correct - it's a limitation of the Spotify service, it only allows Spotify Connect access through paid accounts.

To connect through standard you need something like a tablet to run Spotify and a Chromecast Audio to connect the tablet to the NDS (optical S/Pdif).