There is, of course, history between Paxman and Cameron. When Paxo interviewed Cameron during the 2005 leadership contest, Cameron turned the tables on Paxman spectacularly, attacking the whole Paxman school of interviewing. Cameron’s approach in 2005 was previewed by a very funny piece by Michael Gove in The Times which imagined Paxman interviewing Jesus.
The problem for Cameron is that if he aces the interview, it’ll only be really noticed in the Westminster Village. But if Paxman asks him the same question 14 times without reply, it’ll be replayed endlessly. It is essentially a high risk, low reward interview.