"We've never done that before, and we're never doing it again!"Watch Blackmore's Night play a rare version of a Deep Purple classic

Blackmore's Night onstage at the Birchmere in Alexandria, Virginia .

Footage has emerged of Blackmore's Night – Ritchie Blackmore's neo-medieval folk rock ensemble – performing a rare version of Deep Purple's Child In Time.

The clip, which was filmed on Sunday at the 500-capacity Birchmere in Alexandria, Virginia, shows Blackmore ushering the band through a bucolic version of the 1970 In Rock classic, with singer Candice Night providing a silky alternative to Ian Gillan's scream-embellished original vocal.