All he has done is postpone the investigation which will now take place if he is reelected. I am guessing he has been advised that the Select Committe will find against him and that this stunt is his only viable option (or clearing off to the States of course). He can whip the faithful up into a "poor Nigel, the outsider, the only one who can save us from the elite" and all the other nonsense he comes out with and the hard of thinking may return him to the HoC. But does he really want to be there? He certainly shows his face as little as possible, his voting record is abysmal, he has not held one single surgery despite having all those millions to spend on his security. Only in it for the money and the contacts