Having just looked at the 206 posts to date, I believe the real problem is lack of staff at the new terminal. I had not realized that BA still has an operation (smaller I agree) at Terminal 1, 3 & 4. Clearly there will still be staff there, and as I am sure BA has not recruited any more people then they have to be shared with T5.
So surely the way ahead is to get all flights into T5 as quickly as possible so all staff can be concentrated at T5. I do realize some a/c, 757s I believe, are not suitable for T5 which is probably why these a/c are being given to Open Skies.
However the other problem is those flights which are not at T5. Does the general public know which they are? I admit I am not really sure despite having more info than SLFs. T5 has been marketed as a seamless centre for all BA flts, clearly it is not, and the sooner this anomaly is resolved the better. Walsh should resign on the spot.