Competition: we've teamed up with designers Beta Tank to give away five signed copies of their new book Taxing Art. More »

Design studio Beta Tank have designed a chair with moving panels that transform it from a functional object (on which tax is payable at 19%) to an art object (tax payable at 7%). More »

Designers Beta Tank have developed a working version of Mind Chair, a chair that transmits moving imagery to the sitter’s brain via a grid of solenoids on the chair back. More »

London designers Peter Marigold and Beta Tank have created a chair that uses sensory substitution technology to transmit moving imagery to the sitter's brain. More »