I really wonder just how much better T5 will be in a few years time. It is already too small for the BA operation and with a percentage of flights leaving from T3 I just cannot see all the promises of T5 being delivered! I actually believe that T5 would require a third satillite building to support the planned expansion of BA in the coming years as T5C will not be enough! And how long before the usual problems of baggage belt congestion creeps into the new terminal???
Me cynical? Never!