In the run up to the annual Barclaycard Mercury Prize, organisers have announced details of a special performance from three shortlisted acts that will be taking place at LSO St Luke's on the 10th of October, raising money for War Child in the process.

You can win a pair of tickets to the show by answering this fiendishly difficult riddle:

What was the title of Plan B’s chart-topping second album, released in 2010?

  • The Increasing Irrelevance of Paul Banks
  • The Defamation of Strickland Banks
  • The Offensive Significance of Panzer Tanks

Send your answers to hello@thefourohfive.com.

Plan B, being arguably the biggest name of the acts who are all headlining the event will undoubtedly be performing choice cuts from his nominated album, Ill Manors, whilst Django Django's impressive and eclectic debut will augment Ben Drew's gritty rap-realism with some high-minded and high-spirited art pop. Completing the proceedings will be Sam Lee: Promoter and visual artist turned musician, who’s unconventional take on folk music completes what promises to be a diverse evening.

Tickets are available in the form of a ballot that is open between 10am today (Monday the 24th) until Wednesday the 26th can be found here.