Speaking on Broadcasting House Aitken - a former Conservative cabinet minister - said he sent Huhne a book of psalms, along with a "cheerful" note, and received a "nice letter back".

BBC: Chris Huhne and Jonathan Aitken exchange letters

For that, I had to create and add a digital note in the book (using the iPad's on-screen keyboard) or do the unthinkable use a pencil and paper.

WSJ: A Textbook Case of iPad Fun With Studying

Finally, given the seriousness of the Committee's inquiry and its conclusions about me, it is disappointing to have to note the highly unusual spectacle that a Committee member has seen fit to publish a self-proclaimed controversial book in advance of the Report where he and a co-author prejudge that I and others at News International misled Parliament.

BBC: Fair hearing