Tens of thousands more also messaged a plinth website with their suggestions about what statue or work should occupy the plinth.
The Greater London Authority admitted today that many of those voting on its website were against the idea of contemporary art in Trafalgar Square. Most would have preferred an iconic or historical figure to occupy the plinth, originally erected in 1841.
However, quite what it is Londoners said is today unclear - because the Mayor's committee refused to reveal which of the original six shortlisted works emerged as the favourite of the tens of thousands of people who expressed their opinion, either on the lavish Fourth Plinth website or at a National Gallery exhibition dedicated to displaying the choices.
Asked what the public's favourite was, Mr Nairne said: "All I'll say is that there were a lot of comments in different directions, positive and negative. What we were really interested in was getting a gauge."
He added: "At the end of the day it was an artistic judgement."