My new paper with Peng Xue, Kunkun Wang & team just hit the preprint server. It is entitled Violations of a Leggett-Garg inequality without signalling for a photonic qutrit probed with ambiguous measurements.
In it Peng’s team have measured my proposal to do a doubly no-signally version of an LGI test with a qutrit.
Pre-print here: https://arxiv.org/abs/1711.05172