The nearest tube is Shepherds Bush Market tube station.[Note it is Shepherds Bush Market tube- Circle and Metropolitan lines; and NOT Shepherds Bush tube -Central line] . The location also has very good bus links.
The stall will be on the Uxbridge Road outside the Bush Theatre, 7 Uxbridge Rd, London W12 8LJ on the corner of Pennard Road and Uxbridge Road.
For a map of the location please go to http://goo.gl/maps/76xVY