Detectives are hunting a “lone wolf” burglar who stole bespoke jewellery and designer items worth more than £10m in a 19-minute heist at a billionaire’s row mansion in London. The man broke in through a second-floor window and cracked a safe to carry out what is believed to be one of the biggest ever thefts from a British home. He struck at the 13-bed house in Avenue Road, St John’s Wood, on Saturday 7 December, while people were inside. The Guardian understands the man broke in at 5.11pm and spent five minutes rummaging through rooms before clambering down stairs to