Boris Johnson to give press conference at 5pm - watch live Boris Johnson fights to reopen schools before Easter EU threatens to block exports of Pfizer Covid vaccine Coronavirus latest news: Quarantine hotels set to be high-risk countries only William Hague: Constitutional tinkering won't stop SNP juggernaut Subscribe to The Telegraph for a month-long free trial The row between the European Union and AstraZeneca - in which Brussels has threatened to block vaccines made in the bloc from being exported - will not disrupt supplies to the UK, Downing Street has said. Brussels last night imposed tighter controls on exports after becoming embroiled in a row with AstraZeneca, with the drugs company expected to deliver 50 million fewer doses to the EU than expected. The Prime Minister's official spokesman said: "AstraZeneca are committed to delivering two million doses a week to the UK and we are not expecting any changes to that. "[Pfizer] supplies will be lower this month and next as it upgrades its factory but it will then increase production in March. Projection of volumes of delivery remain the same for that period." Asked what the UK would do if there was a block placed on the Pfizer vaccine arriving from Belgium, the spokesman said: "I'm not going to get into hypotheticals. We continue to work closely with our suppliers and I've pointed to the fact that we're confident of our supplies." This morning German Chancellor Angela Merkel urged a "fair" distribution of coronavirus vaccines across the world. "Money is one thing, but the other thing in a time of scarcity is the availability of the vaccine. Here it's about a fair distribution, and not about a question of money," she told an online forum. "Let's not kid ourselves, the question of who gets which vaccine in the world will of course leave new wounds and new memories because those who get such emergency help will remember that." It comes as AstraZeneca vaccines meant for and paid for by the EU could have ended up in Britain, diplomatic sources in Brussels claimed today. Follow the latest updates below.