Tapadh leibh, Madam Deputy Speaker. In his statement on 7 July, the Secretary of State agreed with me that 80% of positive cases are asymptomatic and said that we are using capability for testing of asymptomatic people. Unless we patrol for the virus, today it is Leicester but tomorrow it will be somewhere else. One serious gap for many communities is the people returning from work as merchant mariners and oil rig workers. Most workers are routinely tested going on to oil rigs, but not coming off them, and I know of some oil rig workers who have tested positive having taken tests for various reasons when they have come off a rig. Will the Secretary of State commit to testing returning mariners, and especially those coming off oil rigs, because it is a danger and a gap that we have left open—that unchecked people may be unwitting asymptomatic coronavirus carriers. Will he please do something to close this gap?