Some people are obsessed that they will be charged for any call out at all, that simply does not happen.
Not what I've been told by Zen on several occasions (and Be before that). I can even quote from Zen:
"Engineer Charge of £130+ VAT, which would only be applied if the cause of the fault is due to damage to the line within the property boundary that has been caused by yourself, if you have placed equipment on the line that is causing the fault or if BT cannot find a fault on the line"
If BT's policy has changed, hurrah, but this is what's grinding my gears. I've no objection to paying for damage I've caused or dodgy wiring after the master socket (there is none). I object to being threatened with a charge if something they can't define and isn't always present isn't found.