24 hours, 24 photographers, 24 years
On New Year's Day in 2004 a group of artists from Central Saint Martins College in London divided up the hours of the day and took one picture each - the resulting images being their collective experience of that time.
Yet the project did not end there. The aim is for these 24 postgraduate students to repeat the process each year for 24 years, steadily moving through the hours of the day, so that by the end each will have shot a photograph from each hour in the day.
Inevitably there have been changes to the original group. Some have fallen away and others come back to the project after a break. The latest collection of photos is now on show in Berkeley Square, Mayfair until 19 March. To ensure some sort of cohesion to the show, there is always a guiding theme, this time it is "empty".
"The exhibition is going from strength to strength and now in our ninth year we've really developed an identity," says Claire Spreadbury, the founder of 24photography.
"New Year's Day is an exciting time of the year, and we hope that 24 captures some of that excitement, but also gives a little glimpse into the rest of the day after the celebrations and parties."
Here's a selection of photos on show this year, some accompanied by comments from the artists.
01:00 Guy Bell
02:00 Alys Tomlinson
06:00 Sarah Lucy Brown
07:00 Nicky Willcock
11:00 Allan Pollok-Morris
14:00 Angela Zair
18:00 Claire Spreadbury
19:00 Ildiko Buckley
21:00 Otis Edwin
You can see more of this year's pictures and follow the project on their website.