Join the Music on the Brink Twitter Q&A on Thursday at 1630

**The Q&A has now finished. You can follow the questions and Charles Emmerson's answers by clicking here**

STOP PRESS! We've arranged a Twitterchat with historian Charles Emmerson, this week's guest on Essential Classics, from 430 pm to 530 pm on Thursday 9 January.

Tweet your questions for Charles using the hashtag #MusicOnTheBrink.

For full details of the WW1 - Music on the Brink season (including downloads) read this blog post.