Quantum Lattice started in a rented desk at a co-working space in Edinburgh's New Town in January 2017. Dr. Marcus Hale had left Meridian Capital Partners the previous autumn with a single conviction: that the gap between what organisations know and what they decide was not a data problem. It was a method problem. The first client was a mid-sized infrastructure fund that had been sitting on eighteen months of project performance data and could not agree internally on what it meant. The engagement took nine weeks. By the end of it, the fund had a working model, a documented decision framework, and, perhaps more usefully, a shared vocabulary for disagreeing productively.

The practice grew slowly and deliberately. In 2019, Quantum Lattice moved to a permanent office and brought on a second analyst, Priya Nair, who had come from the Government Statistical Service and brought with her a discipline around data provenance that has shaped every engagement since. That same year, a referral from the infrastructure fund led to a relationship with a regional NHS trust that was trying to model patient flow across three sites. The work was harder than anything done before, partly because the data was messier and partly because the stakes were more visible. It took longer than planned. The model that came out of it is still in use.