Keir doubles down on migration pledge as new raft of small boats arrive hours after ‘take back borders’ promise 

LEFT-WING Labour MPs have attacked Sir Keir Starmer for warning Britain would become “an island of strangers” due to mass migration.

The PM today faced down a growing backbench revolt over his measures to curb arrivals by 100,000 each year.

Gary StoneMore small boat arrivals being taken ashore today[/caption] Gary StoneMore than 12,000 Channel crossings have happened this year[/caption]

He doubled down as a poll showed that immigration is the most pressing concern for voters – even more than the economy.