LONDON (Reuters) – Britain said on Tuesday that healthcare workers, social care staff and the most vulnerable will still get COVID-19 tests without any charge when it ends free testing for the general public next month. When he announced all coronavirus restrictions would be scrapped in February, Prime Minister Boris Johnson said free tests would end on April 1, saying the country could not afford their cost. Health minister Sajid Javid said people at risk of serious illness from COVID-19 would continue to get free tests if they developed symptoms, along with National Health Service staff, tho…