As others have said, this sort of problem is well documented. Just think how pulse dialing works: tap the flash hook. One click, another click, followed by two clicks. Quite easy to imagine this sort of thing happening on a faulty line. I believe this is how the fault occurs. Simply put, 112 is not a very smart choice for an emergency service
I occasionally heard about this sort of thing happening to NTL customers, and I believe I remember a few BT techs mentioning it at a CWU branch meeting once also. It's one of those "rare, but common" problems
It is a very serious and sensitive issue though so I'm not surprised that techs would temporarily disconnect such a line: false emergency calls could cause confusion and put lives at risk. Can any techs confirm if these kind of faults get can/should get priority treatment? Can you recommend any way the customer can escalate this to the best people and get it sorted quickly?