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In another life myself and two other people were responsible for building the full-scale mock-ups of the first full length beds which went into BA business class in maybe '98 or '99.
In a shed at Heathrow, we had half a cabin mocked up, with a mirror as the wall which ran down the middle - to give the impression of a complete cabin. The seats/beds were interlocked and facing opposite directions. One of the purposes of the mock-ups was for cabin crew to figure out how they were going to serve coffee to the passenger furthest from them without spilling it over the closest passenger. It was the last freelance job I did (It was for Jony Ive's old company) before I moved to The Science Museum.
JurekB-
One of the most perplexing business class design decisions ever...BA to this day are the only operator currently flying with business class seats where you need to step over other passengers to get to the bogs. Or pour coffee over other passengers if you are staff.
They lost a lot of customers over that decision.
Stonehedge
You have the very front two windows to yourself...