I've just had word from Charlie Angus's team that he'll be available for a Q&A tomorrow, time yet to be confirmed.
I know this is a tight timeline, but please submit your questions here ASAP. We'll pick the six or seven that best represent a diversity of views, will send them to Charlie's team, and then post the answers in a live thread tomorrow.
Edited to add: Charlie is ill and won't be able to do our Q&A until early next week. We wish him well and look forward to our dialogue with him.