When David Cameron made his first official trip to Washington, one of his official gifts for President Obama was UK artist Ben Eine’s piece, Twenty First Century City.

Stuart Boyd from art collective Subism (right) challenges you to create a three-colour artwork fit for a king – or president, prime minister or other head of state – and enter it into an exclusive competition to see it released as a limited-edition screenprint created by artist and printer Waste.

Stuart created the project as part of 'Briefs encountered' feature in the October issue of Digital Arts (Macworld's sister publication), which brought together briefs from the likes of Erik Spiekermann, Jon Burgerman, Ben The Illustrator, McBess,, David Pearson, Jonathan Kenyon from Vault 49, Lizzie Mary Cullen and many more! More about that issue can be found here.

Subism is best known for putting on live art nights featuring the likes of Julie West (below), Mr Penfold (bottom) and Phill Blake.

Each print of your work will be sold on the Subism online store for a £50, of which you’ll keep 70 per cent (£35).

To enter, email your artwork as JPG or AI to [email protected] by October 31 2010. No more than 4MB please -- if you win, we’ll contact you for a hi-res version if necessary.

Your piece should include no more than three colours.

For full details, see here.