Following on England’s reopening to fully vaccinated travelers from the US beginning Aug. 2, United Airlines is adding flights to London. The carrier will have six daily flights between the US and London starting in August, including a second daily flight from Washington DC and increasing service from Houston to daily. United said it looks forward  to resuming additional London service in the coming months as well as launching new nonstop service between Boston and London. Customers traveling to England must be fully vaccinated in the US with vaccines that have been approved by the FDA and must take a test before departure as well as a PCR test within the first two days of arrival. Passengers vaccinated in the US will also need to complete a passenger locator form prior to traveling to England and provide proof of US residency. Patrick Quayle, vice president of international network and alliances, said that the announcement is “another major milestone in recovering from the pandemic with the opening of one of the most important markets from the US.”