Originally Posted by sithlord
in coach on ba to nairobi but were not allowed in the ba lounge
Entry to lounge is dependent on class of service (or FF status) at departure airport for flight segment.
As your folks were in *economy* from London to Nairobi, and have no status with AA/BA/OneWorld, they were not entitled to use lounge.
The fact they flew business US-UK was irrelevant.