A man has been arrested on suspicion of murder after a woman and three children died in a house fire in north-west London. br br A 43-year-old woman, and one girl, aged 15, and two boys aged eight and four-years-old, died, in Tillett Close, Stonebridge, the Metropolitan Police said. Police had previously said the three children were all boys. br br Their next-of-kin have been informed, the force added. br Report by Kennedyl.