There was an 'understanding' with the Company that if attendance became a problem on certain identified routes which had previously paid high allowances, BALPA would have to deal with it. NRT became a weak link when the hourly rate was introduced.
Yep, I well remember all the dire warnings from certain senior folks (perhaps with vested interests?) about the dangers of the hourly rate and the "unattractive" destinations. Nevertheless I don't remember NRT becoming such a "weak link" that BALPA or BA had to "deal with it". As you correctly said in your earlier post it simply went "junior".
The cabin crew rest seats are not saleable seats, but in an overhead rest area not accessed by passengers on both aircraft types.
As Wirble. has pointed out that's not true on the 777-200's.