I can confirm that I have managed to complete my entry for this exhibition being organised by David Sandum. My entry, 'Soldier', is a postcard sized work and measures just 12.5cm x 16.6cm (including the mount):
I do not think that I have ever completed such a small scale art work (discounting preparatory work). This has been the perfect mini-project to get me moving again after meeting the Open 22 exhibition deadline. It was also nice to work on watercolour paper for a change instead of canvas.
It has inspired be to do some more mini-artworks that I hope to put on Folksy soon. From correspondence that I have had with other twitter artists there seems to be a real buzz about this project, and it is great to be able to offer support to a good cause. I hope that the exhibition is a great success (which I am sure that it will be).