I did a Cordon Bleu course in what is now Prime 7 - was Latitudes then - and the view from the windows as we shopped and stirred was terrific.
As for the White Cliffs - itis quite an extensive area, but if the ship is out in the shipping lanes in the Channel and the weather isn't clear your view might not be either. So let's hope for a sunny day!! Just so you know the Channel is one of the most "trafficked" sea lanes in the world, with north-south traffic as well as boats and ferries crossing from England to France and back. So it is very very regimented and there isn't much latitude for a captain to choose his own route...