Rishi Sunak and Sir Keir Starmer clashed over migration and the betting scandal that has engulfed Westminster in their final televised head-to-head before polling day.The Prime Minster asked the Labour leader if he was planning to make a deal with the Taliban to send back asylum seekers rejected from the UK in a spikey exchange over the small boats crisis.In response to a question from the BBC audience, Sir Keir said his government would "smash" the human trafficking gangs profiting from people making the perilous journey across the Channel.