Rival Tory leadership candidates have turned their fire on Penny Mordaunt as she continues to gather momentum in an increasingly acrimonious race. But who is leading the UK PM race? The 5 remaining contenders to be Britain's next prime minister will go head-to-head in the first of three televised debates, hoping a good performance will boost their chances in a battle that so far has no clear frontrunner. NDTV's Parmeshwar Bawa reports.