4 February Huhne pleaded guilty on re-arraignment, and was appointed to the Chiltern Hundreds, the formal means of resigning his seat in Parliament. This triggered a by-election. He was remanded on unconditional bail until sentencing at a date to be notified. In February 2013, at the trial of Vicky Pryce it was revealed that Constance Briscoe had been arrested in relation to statements she had made to police that she had not had any involvement with the leaking of the driving licence points-swapping story. Briscoe was arrested on 6 October 2012. She was later convicted, sentenced to 16 months in prison and disbarred. Prosecutor Andrew Edis told the jury that Briscoe and Pryce had "started it together by approaching a man called Andrew Alderson (a journalist working for the Mail on Sunday)", falsely claiming that one of Huhne's aides, Jo White, took points for him in 2003. Edis stated that Briscoe was a neighbour and friend of Pryce and that the "two of them appear to have cooked up a plan" to bring about Huhne's downfall. On 11 March 2013, Huhne and Pryce were each sentenced to eight months' imprisonment. Huhne started serving his sentence in HM Prison Wandsworth but was reportedly transferred to HM Prison Leyhill in Gloucestershire. On the day after sentencing, David Burrowes MP wrote to the Attorney-General Dominic Grieve, asking him to exercise his power of referral to the Court of Appeal, as in Burrowes's view the sentences were too lenient. Grieve had until 8 April – 28 days after the original sentence – to decide whether to refer the case to the Court of Appeal, which has the power to increase sentences. Huhne and his ex-wife were released on 13 May 2013, having both served two months of their eight-month sentences. Following their release, both were subject to electronic tagging. Huhne was required to stay in his home between 7 pm and 7 am. Huhne described prison as, "a humbling and sobering experience." Writings Books Harold Lever and Christopher Huhne, Debt and Danger: The World Financial Crisis (Penguin, London, 1986). Christopher Huhne, Real World Economics: Essays on Imperfect Markets And Fallible Governments (Penguin, London, 1991). Michael Emerson and Christopher Huhne (with a foreword by Jacques Delors), The ECU Report: The Single European Currency, and What it Means for You (Pan Books, London, 1991). James Forder and Christopher Huhne, Both Sides of the Coin: The Arguments