The Duchess of Cambridge has left hospital this morning after receiving treatment for acute morning sickness.
She left King Edward VII hospital in central London with her husband Prince William. Catherine was admitted on Monday less than 12 weeks pregnant.
St James's Palace says she's now heading to Kensington Palace for a period of rest.
More top news
The man was taken early this morning to a south London police station where he remains in custody.
Officers arrested a 15-year-old boy in Stratford on Saturday night on suspicion of grievous bodily harm.
Six people were injured after they were hit with the substance during an "altercation" between two groups at a shopping in east London.