"When cancelling such lines in favour of alternatives I have found in each case you were rolled over into another 24 month contract with no notification that had happened and therefore lumbered with early termination fees."
This does not make sense to me. If you are cancelling a line, then ANY retailer cannot roll you over into another contract be it 1 day, or 24 months. You have asked for cancellation of a service surely?
Being an exchange only line is irrelevant. being a lift alarm line means they may be other issues around other contracts on the line.
Poor explanation on my part.
Over a 10 year period, unbeknown to us at the end of each two year period, without any intervention by us, we subsequently discovered we were rolled over each time into a new 24 month contract. How was that possible? When we decided to switch to a mobile network provider, thinking we were well out of contract terms, we were landed with early termination charges on cancelling the BT service. Strangely enough it was just for critical care which had never been asked for. It has been impossible to talk to be BT about this matter because of DPA, as were deemed not to be the 'owner' of the line, the later bankrupt builder ordered and installed the service for the lifts and door entry systems.
My OP was purely to get a feeling how, at the end of a contract, what actually happens. My belief was that not being a migration, some sort of termination fee might apply, or a notice period required. Google found nothing on that subject.
We are specifically talking about apartments that were formerly managed by agents which are now self managed and therefore we now have sight of every bill received for "Landlord" services.
Yes indeed a lift entrapment call facility is a mandatory requirement, but issues you allude to do not apply here.