The British Home Office is to write to councils urging them to take children who have arrived illegally in the UK without any parents or guardians. A voluntary scheme is now going to be compulsory, meaning youngsters being looked after by authorities on England’s south coast will be moved to other parts of the country. The Home Office will send more than 200 councils a letter giving them two weeks to present reasons why they should not accept them. They are expected to be told about the change later on Tuesday. It comes after the Home Secretary defended her efforts to tackle the crisis. Enver Solomon, chief executive of the Refugee Council, said: “Children who arrive in the UK on their own seeking safety are highly vulnerable. They must receive local authority care immediately, a responsibility that must be shared equitably by all local authorities in the UK. “This important …