Police say that a woman, who's believed to have given a bottle of bleach to a baby in Eltham, was wearing black trousers, black trainers, a long multi coloured top, a black jacket with white chevron type markings and was carrying maroon bag.
She has also been described as "a heavily built white female in her 50s with grey hair".
More top news
A power cut has led to travel disruption for Eurostar passengers heading in and out of St Pancras International.
Taylor Swift left fans pleasantly surprised as she brought out Robbie Williams during her second performance at Wembley Stadium.
A 15-year-old boy has been stabbed to death in a large fight after a birthday party attended by up to 100 youths in east London.