British foreign minister David Cameron will call for increased coordination between allies to address the “desperate” humanitarian situation in Gaza during a visit to Paris and Rome on Tuesday, his office said. “As we face some of the greatest challenges to international security in a lifetime, our response must be one of strength and resilience with our European allies,” said Cameron, a former prime minister who took over the foreign secretary role about a month ago. “From the desperate humanitarian situation in Gaza, to (Russian President Vladimir) Putin’s brutality in Ukraine, it is more im…