A 35-year-old man has been arrested on suspicion of causing grievous bodily harm after a suspected acid attack outside a school in west London on Monday.The Metropolitan Police said the man was arrested on Thursday morning and remains in custody after the incident outside Westminster Academy.A 14-year-old girl who sustained injuries which are "being treated as potentially life-changing" has returned to hospital having been briefly discharged by doctors, police said.

A 35-year-old man has been arrested on suspicion of causing grievous bodily harm after a suspected acid attack outside a school in west London on Monday.The Metropolitan Police said the man was arrested on Thursday morning and remains in custody after the incident outside Westminster Academy.A 14-year-old girl who sustained injuries which are "being treated as potentially life-changing" has returned to hospital having been briefly discharged by doctors, police said.