The answer is: very soon. Here's some information from the wonderful people at BurnGormanOnline, care of xenutia1 and the Torch_wood Livejournal community.
" Two New Projects and a Nomination For Burn Gorman
We have a triple whammy for you from BurnGormanOnline, with two new projects for Burn this month and the What'sOnStage award to boot!
First off, we have had word that Burn is to play the Tin Woodman in a new radio adaptation of L. Frank Baum's The Wizard of Oz. This is set to air around the 18th of December but as yet the listings have not been released, so we'll get back to you with details as soon as they are.
Second is a chance to see him live, but hurry, tickets are selling fast! Burn is narrating The Southbank Centre's newest run of Peter and the Wolf, which uses camera projection technology to transmit images of a scaled-down set onto a screen over the stage. The short animated film won in its category in the 2008 Oscars, and this new production features a fresh script from poet Simon Armitage, and an introductory skit (also featuring Burn). You can read the full article or book tickets here. It is only 6 shows, running at both matinee and evenings from 28th-30th December, just perfect to cure the after-Christmas blues!
Last but certainly not least, Burn is currently in the lead in his category at the What'sOnStage awards, but it's a close-run thing so let's vote like the clappers and get him a win! He has been nominated under "Best Supporting Actor In a Musical" for Oliver! John is also way ahead in the "Best Takeover In a Role" category, and for those that were lucky enough to see Oliver!, Jodie Prenger is also leading the "Best Supporting Actress in a Musical" category. "
Thanks to www.burngormanonline.com for the updates.