More than 1.3 million people have signed a petition urging the government to call off President Donald Trump's state visit to the UK, amid a row over his recent immigration measures. Downing Street, however, said Theresa May was looking forward to the visit. Boris Johnson is addressing MPs amid confusion over whether UK dual nationals of seven banned Muslim-majority countries are affected. Mr Trump's executive order on immigration has caused anger worldwide. US airports have seen chaotic scenes as travellers were detained on arrival. Buckingham Palace has declined to comment on the row.