The only other ladies I can identify are the Duchess of Connaught (in front of QM) and possibly Princess Helena who is partially obscured by the pillar.
I wonder if Princess Helena is wearing the elusive turquoise tiara which Queen Victoria gave to her when she married?
Apart from the 1911 Coronation photo (the clearest being one held by the Guildhall) the only other photo which I have which may show Princess Helena wearing this tiara is --
showing members of the Royal family watching Queen Mary leave for her honeymoon in 1893.