The master socket is BT's property, not the homeowners. BT are responsible for maintaining this. If there's obvious damage by the homeowner BT can charge although it's hard to proove the homeowner did the damage. A previous owner may have botched it up etc.
I would definitely appeal the charges and ask for the case to be escalated.
Any internal wiring, ie wiring beyond the master is chargable.
If you don't have anything plugged into the master. For example if everything plugs into an extension. If that extension failed as the extension cabling had become loose inside the master... BT could charge for this, as the extension caused the fault, not the master.
BUT in this case - I'd say no charge.
You say the master isn't accessable, assuming there's no extensions as stated, how do they connect their devices if they can't access the master?
Edited by ukhardy07 (Tue 14-Jun-11 00:58:38)