In October witnesses had reported seeing Mr Brittain being bundled into a black FordMondeo in Clarendon Way, Colchester, and driven away from the scene.
The prime minister gets an armour-plated Daimler, the deputy prime minister a Jaguar, cabinet ministers a Rover 800 or Vauxhall Omega and junior ministers (poor things) a FordMondeo, Vauxhall Vectra or Nissan Primera.
The police watchdog continues to appeal for information from anyone who saw a red FordMondeo travelling the wrong direction on the eastbound carriageway of the M4 near the Christchurch Road motorway bridge at around 0315 BST.
Union representative Luc Prenen said that Ford would transfer production of the new versions of the Mondeo and S-MAX marques to its plant in Valencia in Spain.