The BOAC lease of the CL44 came at a time when BOAC wanted to purchase convertible B707s but the UK Govt would not issue authority for the purchase, intending BOAC should purchase convertible Super VC10s.
The CL44 rotations were via Manchester and Prestwick each way.
As regards the windows on the CL44, there was much made of the increase in visibility at the time which was reflected in comments in Flight, Air Pictorial, Aviation Week and other magazines.
I have a slide I took of the Suramericanas CL44 at Miami in May 1988. To say it looked - and sounded - rough would be an understatement.