– Boris Johnson made combative start to his time in Downing Street yesterday
– He insisted Irish border backstop must be scrapped for the UK to do a Brexit deal
– Told Emmanuel Macron in tense late-night call the backstop must be on the table
– No10 said he made clear negotiations cannot begin until EU agrees to scrap it
– French ministers accused Mr Johnson of ‚posturing‘ with the Brexit demands
– EU diplomats raised fears he won‘t back down and could spark ‚Brexit Cold War‘