It was a beautiful, well-planned floating city built in harmony with its surroundings, in the middle of a lake.

BBC: NEWS | Programmes | From Our Own Correspondent | Mexico's sinking city

Ken Farrow, head of fraud at Lloyds TSB - and a former detective chief superintendent in charge of the City of London Police's economic crime department - believes the well-planned nature of the robbery suggested a plan on how to dispose of the cash was in place.

BBC: NEWS | UK | Can the robbers launder the money?