Thanks to reader Benedict for spotting a special offer on next week's Verdi Requiem at the Barbican with Gergiev and his Mariinsky ensemble. Soloists are Victoria Yastrebova, Olga Borodina, Sergei Semishkur and Ildar Abdrazakov.
Lastminute.com are offering best-available tickets for just £15 (originally up to £65).
Alternatively, you could scoot over to the Barbican website, where loads of seats have been 'dynamically priced' down to £15-£25, around half what some of them were originally going for. (Now, should we tell the Barbican why their advance sales are down this season - or just let them guess?)