Police have said the search for escaped alleged terrorist Daniel Abed Khalife is now focused on the Chiswick area of west London. As the search for the Wandsworth prison inmate enters its fourth day, the Metropolitan police said there had been confirmed sightings in the area, just under 5 miles from the prison, including calls overnight from members of the public. Khalife is believed to be wearing a black baseball cap, black T-shirt and dark-coloured bottoms, and carrying a small bag or case, Scotland Yard said. The news means he has changed out of the prisons chef’s uniform of a white T-shirt and red-and-white gingham trousers that he is thought to have escaped in. “Officers remain in the Chiswick area and are planning to carry out further intensive search activity there through the day,” a spokesperson said. Anyone who believes they have seen him has been asked to ring 999. The update from the Met comes a day after officers confirmed that the suspected terrorist had been spotted walking away from a food delivery lorry at a roundabout a mile from the jail. Detectives had shut off the 2,500-acre Richmond park in south-west London to search for the 21-year-old, but did not find him. He grew up in south-west London and is thought to know the area well. Khalife was in remand awaiting trial on charges that he tried to pass military secrets to Iran and planted fake bombs at a military base. He escaped from the prison in south-west London on Wednesday morning by strapping himself to the underside of a Bidfood delivery van as it drove out of the prison. A close relative of Khalife has urged him to hand himself in, telling the Times: “If I could talk to him, I would tell him to end this and give himself up, even though I understand he is afraid.” They added that they blamed the British army for his downfall, calling Khalife a “very, very intelligent, easygoing and kind boy”. They said he had changed in the past year. A former army colleague said he was shocked at Khalife’s prison escape. He said they became friends when they first trained as soldiers aged 16. “He was quite a nice chap. He was always at the front of the pack for phys [physical training],” he told the BBC. “It was quite a weird feeling knowing that you were friends with him and now he’s this type of person … You do wonder what’s gone on.” Commander Dominic Murphy, of the Met’s counter-terrorism command, said: “This remains a fast-paced and dynamic investigation, but I want the public to know that a large number of officers are working extremely hard to locate Khalife. “We have now received more than 100 calls from the public, and we thank everyone who has contacted us with information. The sighting near Wandsworth roundabout could be very significant, and this is one of many useful lines of inquiry that officers are perusing. “My message to him is to hand yourself in – either call us or go to a local police station and hand yourself in. With the reward we are offering today and the amazing support we have had from the public and the media, we will be closing in on you.” He added that the focus of the search remained on London. More than 150 counter-terrorism officers and staff have been working on the search for Khalife. Whether Khalife was helped to escape by prison staff is also being examined by investigators. It comes as former justice secretary and prisons minister Robert Buckland, who held the prisons brief for two months under Theresa May, told BBC Radio 4’s Today programme on Saturday that the prisons system had been “forgotten” in recent years. “There is no doubt that our Prison Service is a forgotten service in our country,” he said. “It’s a service that either people don’t want to talk about or just don’t know enough about. “We run the prisons service at a hugely hot rate, about 98% capacity and I think that isn’t a desirable state of affairs. We need more capacity to allow for flexibility.”