With the swift engulfing of that building by a roaring inferno fanned by a strong wind from near bottom to the top 24th floor and on all four sides, I would imagine that any chance of a helicopter hovering above it for winching, let alone landing on (if it had such a helipad) would have been very slim to say the least.
There were though the usual media helicopters providing live feed at a safe distance for the rolling news channels. As the BBC told our boss when he pleaded that they withheld reporting of a Hercules crash at Fairford, in which all six crewmembers died late afternoon, until the late news so that next of kin could be informed first, "Sorry, I'm afraid not. The public have a right to know, you know". ITN, when similarly asked, obliged.