Bravo. BA management finally sees some sense. Colleagues at BA pointed out to me last weekend that if BA management were to go ahead with the move from T4, T5's opening fiasco would look like a walk in the park.
And understandably, those who were to move to T4 after BA vacating, will hopefully demand damages from BAA (not BA). As long as this does not affect T1/2/3 too much, pax should hopefully grin and bear it a little while longer (or avoid LHR altogether). My future flights are mostly out of LGW - in a way that's a blessing in disguise.
S.