There may possibly be another link to the 'Landfall' film; Nevil Shute Norway, to give his full name - an aero design engineer who was senior stress man on the R100 under Barnes Wallis, see 'Slide Rule'- founded Airspeed at nearby Portsmouth airfield.
He often visited Langstone Mill, between Langstone village and Emsworth.
Dan Winterland, is it a trick of synchronisation or is the starboard engine on that Anson slow / stopped ?