Since it was completed in 1845, Trafalgar Square has been visited by tourists from around the world - a site for New Year celebration and political demonstration, it has been home to pigeons (formerly) and Christmas trees (annually) and of course, to works of art.

In addition to a series of statues and sculptures on display are four plinths. Three of them bear statues: of George IV, Henry Havelock and Sir Charles James Napier. From 1999 the Fourth Plinth was occupied by works by three contemporary artists chosen by the Royal Society of Arts. Perhaps inspired by this, the Greater London Authority took control of the plinth in 2005 and instituted its own series of temporary exhibitions. In 2005, the plinth was home to Marc Quinn's Alison Lapper Pregnant, a marble bust of the nude and heavily-pregnant artist, who was born with no arms and shortened legs due to a congenital condition. In 2007 this was replaced by Thomas Schütte's Model for a Hotel 2007 - a five-metre-tall, 21-storey structure made from coloured glass.

This week - on Monday, 6 July, 2009 - the latest exhibit was unveiled; Anthony Gormley's One and Other. This public art project involves 2,400 members of the public, each of whom will occupy the plinth for an hour for the next 100 days. The exhibit got off to a shaky start when an anti-smoking protestor climbed on the plinth and called for a ban on tobacco, but he eventually departed in order to enable the first official participant, Rachel Wardell to take the platform.

Since then, individuals have stood on the plinth and released balloons for charity, dressed as mushrooms to raise awareness of the value of fungi, or simply used the time to read a book. You can still apply to be part of the project on the official One and Other Website.

This week, we'd like you to tell us:

• Do you like the new exhibit? If so, why? And alternatively - if not, why not?

• Are you, anybody you know, planning to be one of the 2,400 people members of the public involved in the exhibition?

• If you were going to be a part of the exhibit, how would you use your hour?

• What do you think the Fourth Plinth should be used for?

• Do you like the idea of a changing exhibition or do you think it should be something more permanent?

• Do you think the other statues in Trafalgar Square should be changed?