The work to the distribution system has started. The engineer is visiting each stairwell in turn and adding additional feeds and checking the existing system. Work has started first in the East block. There may be short disruptions in signal during the day as the work is taking place. I will update again when all work is completed. In the interim if anybody wishes to go down the signal stacker route to allow multi channel recording it might be a good idea to get in touch, so the engineer can kill two birds with one stone.
All the best