Former U.K. Prime Minister Boris Johnson considered sending troops to the Netherlands to seize a supply of five million doses of Covid vaccines held in Leiden, according to an excerpt of his forthcoming memoirs published in the Daily Mail. In the spring of 2021, the EU and U.K. were wrestling over the production of Covid-19 vaccines in a factory located in Leiden, near the Dutch coast. The factory was run by Halix and supplied AstraZeneca vaccines contracted by both Britain and the EU. Amid scarce supplies of vaccine doses, European Commission President Ursula von der Leyen had threatened to cut…