I came across notification for this event in a newsletter from the "other" train company in Birmingham, UK:

2014 Birmingham (UK) International Tattoo,
National Indoor Arena,
Saturday November 29 & Sunday November 30.

A tad far for me to come! But anyone around Brum at the end of the month might want to check it out. Said train company (can't mention the name - would be advertising! ) has a few free tickets in a competition.

I'd never heard of the event before but there have been some in earlier years.