By Matthew Young An emotional Kevin Sinfield burst into tears as he completed the final leg of his ultramarathon charity challenge. After an exhausting 190.4 miles run over seven days – Kevin broke down and hugged his team at the finish line on The Mall, before exclaiming: “I’m knackered and delighted.” He jogged home to huge applause after completing the final leg of his mammoth task – all done to raise money for those affected by motor neurone disease (MND). He said to the gathered crowds: “Hello London! Thank you for coming out. “You all know why we’re here and hopefully we’ve sent the righ…