There are many dramatic stories surrounding the composition of Mozart's Requiem — cloaked strangers arriving by night with secret commissions and so on. Whatever the circumstances of its birth (it was most likely commissioned by a recently bereaved aristocrat who wanted to pass it off as his own composition), Mozart never got to finish it: that task was undertaken by his pupil Franz Xaver Süssmayr (and later by other scholars). It's a work of high drama — at times you almost feel the world of Don Giovanni has barged into the church. The "Dies Irae" — the Day of Wrath — is hurled across the orchestra by the choir with a drama that anticipates Verdi's setting 75 years later, and the striking contrasts in texture, volume and rhythm merely add to the urgency that courses through this Mass. Sir Colin Davis, no stranger to the work, conducts with all the flair and imagination you'd expect from a master Mozartian.