A spokesman for the Metropolitan police, who were called at about 8am said: "A 36-year-old woman has been arrested on suspicion of arson." Simon Baker, who lives in a flat opposite the church in Shepherd's Bush Road, said: "At one point there was smoke and flames billowing from the building. The roads were sealed off as it got worse. The thick, black smoke went down gradually and it looked as though they had it under control quite quickly."