The little office Joe Simmons led me to was a tiny enclosure, in one corner of the large office space. It was separated from the other people in the room because it was a tiny cubicle with solid walls.

I looked about curiously at the other people working in the large room, which had computers on desks, monitors and enormous screens on walls and wires trailing everywhere. A few faces watched me curiously and I smiled back hesitantly. A bespectacled, young man , with a mop of ginger ...