Cartoon canvas © Robert Thompson @ Procartoonists.org

Many cartoonists have contributed small canvases to the Stars on Canvas 2012 charity auction, which runs online until 2 December.

They include Procartoonists.org members Jonathan Cusick, Noel Ford, Tony Husband, Royston Robertson, Robert Thompson, above, and Kate Taylor. There are also canvases by names from the worlds of sport, music and entertainment.

The auction is in aid of the Willow Foundation, which arranges special days and experiences for seriously ill 16 to 40-year-olds. More details here.