More selective reporting by the BBC

I see that the BBC are "going big" on the story of Sir John Butterfill's expenses whilst showing not an iota of interest in the news that so far

"Just five of the 40 ministers who have been reimbursed for the cost of employing private accountants have explicitly confirmed paying tax on the amounts they received."

Why the difference in coverage? Is one backbencher more newsworthy that 35 Labour Ministers? Or does the fact that the backbencher is a Conservative mean that coverage of this story might help Gordon Brown's Labour party to avoid total annihilation in the upcoming EU and local elections?