Boris Johnson is to write to every UK household to urge people to stay at home.The Prime Minister is currently self-isolating at 10 Downing Street after testing positive for coronavirus.The letter will be sent to 30 million households across the UK next week.The Tory leader will write: "We know things will get worse before they get better."But we are making the right preparations, and the more we all follow the rules, the fewer lives will be lost and the sooner life can return to normal."The Daily Record has launched our NHS Heroes campaign to thank the remarkable NHS staff who are on the front lines of this coronavirus emergency.