Each time we hear the following:
"Can you put it through to my 'phone?"
"No, it's going through to Maisie's 'phone. x has picked the call up."
"I must take my 'phone back from Maisie's so that I'm not interrupting people's work."
Of course he doesn't. He never does, not in all the nearly two decades we've been in this building. We'll miss it if he ever does.