Two or more X10 or other PLC modules that are set to the same house and unit code do that they can be triggered by the same command. You might want to group front and back porch lights together for example.
is The British Land Company PLC and its subsidiaries excluding any share of joint venture profits or assets.
The Company and its subsidiaries after Admission.
The Company or any of its subsidiary undertakings
is The British Land Company PLC and its subsidiaries and excludes its share of funds and joint ventures.
Signet Group plc and its subsidiary undertakings