Whilst up at LCY all the "skills" that were inherent in said controller now have to be supplemented by lots of CCTVs with infra-red capabilities
No IR imagery - it was investigated but hot engine exhaust was found to look too much like fire, and aircraft parked on a cold apron left aircraft-shaped IR shadows after they taxied... So its visual imagery (via the cameras) supplemented by radar blocks etc, and all the other gizmos already available in a bricks-and-mortar tower.