Let's say there is a house tenanted by Mr. John Smith and owned by Mr. David Brown.
A while ago, Mr. Smith chose a company A to be his electricity retailer, and has been receiving power bills from them monthly since then. The actual wires that physically deliver electricity to the house are owned by company B, but Mr. Smith does not care about that as it is a matter of relationship between the companies B and A only.
Now, Mr. Smith ends his tenancy and moves out of the property on say the 31st of August. He has sent a notice to company A saying that the 31st of August is the last day he wants them to bill him for power supplied at the property. They said "OK, no problem".
Mr. Brown, the owner of the house, lives elsewhere and has not yet found a new tenant. Meanwhile, shortly after Mr. Smith has moved out, a local homeless guy, Jeff Johnson, noted that nobody is living in the house and decided to take advantage of that. He gets in now and again, boils water, uses electric heaters etc. etc. Here is the question: who, i.e. which company will send the bills for electricity consumed at the property from the 1st of September, and to whom?
