Ukraine will not be able to operate US-built F-16 fighter jets this coming autumn and winter, air force spokesperson Yuriy Ihnat told Ukrainian television late on Wednesday. Ukraine has repeatedly asked its Western allies to supply the country with F-16s, which President Volodymyr Zelensky said would be a signal that Russia's invasion would end in defeat.Follow our live blog for all the latest developments on the war in Ukraine. All times are Paris time (GMT+2).