I can't imagine that Cameron would intervene. Put on the spot on PMQ, he's bound to make the right noises.
Come to think of it, I wouldn't be surprised if the strikingly beautiful Penny Mordaunt was just feigning concern for Pompey in order to secure votes in the future. She did well in the 2010 General Election but the political lanscape will have changed dramatically next time round, and she needs all the help she can get.