Conversation so far:
What was the Electric Light Orchestra's non-performing work?
For six years, Harvest and Epic/Legacy reissued Electric Light Orchestra's back catalogue. Included amongst the remastered album tracks were unreleased songs and outtakes.
What albums or songs of Electric Light Orchestra's back catalogue were included amongst the remastered album tracks?
What were the two new singles included with the remastered album tracks for the reissue of the Electric Light Orchestra's back catalogue?
Included amongst the remastered the Electric Light Orchestra's album tracks were unreleased songs and outtakes, including two new singles, Surrender and Latitude 88 North“
What was the next album the  Electric Light Orchestra released, after the remastered album tracks including the singles Surrender and Latitude 88 North?
Mr. Blue Sky: The Very Best of Electric Light Orchestra was released on 8 October 2012.
Did any of the albums the Electric Light Orchestra released in 2012 top the charts?
What did the Electric Light Orchestra do after releasing the live album, Electric Light Orchestra Live?
Jeff Lynne and Tandy reunited again on 12 November 2013 to perform Livin' Thing and Mr. Blue Sky at the Children in Need Rocks concert at Hammersmith Eventim Apollo, London
How did the live performance of Jeff Lynne and Friends at the Hammersmith Eventim Apollo in November 2013 go?

Question: between whom was their miniature reunion?
Self-contained rewrite: Between whom was the Electric Light Orchestra's miniature reunion?