Michael Symons was the sales associate I met with at their Savile Row shop and he told me the entire upper was hand stitched. He did show me an example of an extremely fine stitch that had to be done on machine but was only on an accent of a certain style of loafer.
I was speaking to him about their full bespoke but he was pushing me towards their semi-bespoke which also had a fully hand-stitched upper.
Color me skeptical. There's a difference between hand-operating a sewing machine and hand sewing with a needle. My hunch is on the former