Britain’s economy could shrink by 35% in the April-June period, and the unemployment rate could more than double to 10% due to the government’s coronavirus shutdown, the country’s independent budget forecasters said.

The Office for Budget Responsibility said the budget deficit could hit 273 billion pounds in the 2020/21 tax year, five times its previous estimate and equivalent to 14% of gross domestic product, its biggest since World War Two.

The projection was based on the assumption that the shutdown lasts for three months followed by another three-month period during which restrictions are partially lifted, the OBR said.