British officials said Tuesday the rate of COVID-19 deaths may be 10% higher than official reports, adding to evidence that European nations have been significantly undercounting the true toll of the virus.

This comes as some hard-hit European countries have begun reopening some businesses. In Italy, which recorded its smallest number of new coronavirus cases in a month, some bookstores and children’s clothing shops have reopened. In parts of Spain, some construction and factory workers are back on the job.

Meanwhile, German health officials said 285 people died of coronavirus-related symptoms on Tuesday, the highest daily death toll in Germany so far.