 Britain's new prime minister, Keir Starmer, has already spoken on the phone with President Biden and Ukrainian President Volodymyr Zelensky. The BBC's Paul Adams reports Starmer won't be wasting any time dealing with international issues. Ukraine and Gaza will be on the agenda when Keir Starmer joins NATO leaders in Washington in four days' time. It'll be a chance for the prime minister to assess Joe Biden's performance and ponder, perhaps, the possibility of dealing with a very different president in a matter of months.