In 2002 John Vohmann brought a retired ex-Wimpey AEC Mammoth Major 6 668DYY to AEC90 at Newark Showground. The attached scan is from the March—April 1964 AEC Gazette and shows a Wimpey MM6 hard at work "somewhere" on the M1 Motorway. The reg number is 66?DYY. Could it be the same lorry?