Westfield sounds more plausible than T5 TBH, when the Stratford Tunnels were bored large areas of Stratford were raised by up to 9ms. The muckaway at Heathrow would dwarf that, I'm pretty sure when I worked on that job and about 300,000 tonnes of recycled waste were spread around Heathrow as well, still you might be right but both ground works phases were running at the same time its just there was enormous pressure on T5 to reduce vehicle movements away from the site etc.
Comment