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".
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Police are hunting a man who is suspected of grabbing an 11-year-old girl who only got away by biting her attacker's hand.
A woman and man have been charged with murder after a baby was found unresponsive on a bus.
Rebecca Casserly was on her way to buy a coffee in north London when her phone was suddenly snatch from her hand by a man riding a bike.