Wallis resigns to spend more time with her family?

Roger Helmer reported it first, and now we confirmation that the third placed candidate for the EP President, and Yorks Lib/Dem MEP Diana Wallis has resigned. Roger highlights an amusing aspect, suggesting that her excuse for leaving cannot be the hoary old 'to spend more time with her family',

So this raises the question of succession (one which I find interesting and topical).  It seems that the second candidate on the Yorkshire Lib-Dem list in 2009, behind Diana, was a chap called Stewart Arnold.  Three things you might like to know about Mr. Arnold.  The first is that he is currently on Diana’s staff.  The second, that he is (despite the surname), the husband of Lib-Dem MEP …. Diana Wallace.  And third, based on hearsay in the corridor, he’s not that highly rated by other Liberal MEPs.