Melissa Auf der Maur has been forced to cancel her show at London's Cargo on April 17. The Montreal-born rocker is currently grounded in Helsinki, Finland after the recent volcanic disruption in Iceland has caused Europe-wide flight disruption. It is said that volcanic ash projected into the atmosphere following the eruption could cause jet engines to malfunction, and as a result, flights across the continent have been grounded amid safety fears.For ticket refund details, fans should contact the venue's box office on 0207 739 3440.Plans to screen her new short film, Out Of Our Minds at London's ICA on April 21, are still scheduled to go ahead. The former Hole bassist will also be on hand to take fans' questions after the screening.Out Of Our Minds accompanies the album of the same name, which will be released through Roadrunner on May 3.