U.K. Prime Minister Boris Johnson unveiled a four-step roadmap on Monday to "remove all legal limits on social contacts" in England by no earlier than June 21, assuming certain tests are met.Why it matters: The U.K. has the worst coronavirus death toll in Europe and saw its economy contract by 9.9% in 2020 — the biggest drop in output in more than 300 years.Get market news worthy of your time with Axios Markets. Subscribe for free.Johnson's government imposed a nationwide lockdown for the third time in January as cases surged due to the emergence of a new, more infectious coronavirus variant.But the country's vaccine rollout has been among the best in the world — with 26.1% of the population vaccinated as of Monday — resulting in a substantial drop in infections and optimism that the outbreak will be curbed in the coming months.Details: Before taking each step, the government will review infection data and ensure that the following four steps ar