Earlier quoted context omitted.
No, but it does include the time to get yourself and your vehicle on to and off of the train that carries vehicles through the Channel Tunnel. https://en.wikipedia.org/wiki/LeShuttle
Ye, I've been travelling on it since the first week it opened. But if you were redirected and had to fend for yourself you would need to book ahead on a tunnel or boat, hire a car to drive from France to Coquelles - find somewhere to drop the car, hire another car in the UK. All assuming you land in Paris in the morning early enough to do all this.
The airlines that redirected flights to Paris arranged buses to London.