Asking this question for a friend. The family have been running a business by renting a small retail unit for about 55 years. Approx. 20 years ago the owner of the unit attempted a major increase in rent in order to remove the tenant. After a legal battle the court decided that the increase wasn't lawful. Now the person renting wants to retire, has no other means of income and was advised that the unit could be legally sublet. My friend wants to go ahead with subletting but is unsure if an estate agent is the correct first port of call and what other factors might be involved. Thanks in advance