Via Instagram, a photo of Nigel in his studio (you can see the corner of the Dalcon console and his well-known AKG binaural microphone head). What you can also see is an EMS Synthi and a 3M tape machine.
Producer David Wrench, who occasionally works in Nigel’s studio, sheds more light on this particular 3M machine, saying it previously lived in the Rolling Stones mobile rig and may have been used to record a number of classic records. (Also: look at the poster in each photo - it’s the same machine and location in both photos.)
Probably not surprising that Nigel would own such storied equipment.
It should be noted that I have not yet identified the speaker mounted in the wall.
OCTOBER 2018 EDIT:
We now know this is Strong Room Studios No. 2 and those mains belong to the studio. This also makes more sense considering that Nigel, in the past, has mentioned how the mains (large mounted speakers) in control rooms don’t “relate to anything.”












