Re: It appears from the article that Mr. Wolmar is a railway enthusiast...
"After dropping you at home the car works the taxi night shift"
And your next day starts with cleaning out the various organic remains last night's passengers left in it. Or do you wait up to do that as soon as it returns from its night shift?
"I don't think The Holborn Effect will stand in the way of that."
Why not? If the Holborn Effect is operational it might be waiting miles away when you want to pick you up from work.