Vicky Pryce, 60, emerged from East Sutton Park Prison near Maidstone, Kent, via a back exit.
The mother-of-five was driven away with her lawyer Robert Brown, pursued by press photographers who been camped outside the Category D open jail for women and young offenders.
The ex-wife of former Cabinet minister Chris Huhne's has served around a quarter of an eight-month sentence for taking speeding points for him.
More top news
A wedding ceremony usually represents a joyous union under the eyes of the law - but for 40 couples in Brazil it was "an act of resistance".
West Mercia Police shared an image of the smashed car held up in branches with the bonnet pointing to the ground.
A joint fire and police investigation is taking place to establish the cause of the fire.