The court was told Brian Mulcahay was discovered by police locked in his vehicle in Belgium on October 4 after ringing his employers to say he had been robbed.
Chatwood was seen to contact some of the other accused conspirators four days later at a Harvester restaurant in Dartford, Kent.
Nine days after the robbery, most of the bullion was discovered in an apartment and a hotel room in Antwerp which had been rented by Stanley Rose.
The robbers were captured within days and had been unaware that they had been watched by police as they hatched their plot.
Although this theft was executed in Belgium, this British lorry and its valuable bullion cargo had been targeted for the theft by British thieves.
This had been a crime 'Made in Britain'.
More top news
The 300-year-old instrument, a Matteo Goffriller 1700 in a dark red case, was taken on Friday.
The London mayor's uncompromising message was delivered in a speech close to EU headquarters in Brussels.
The Marsh & Parsons poster - captioned "a charming period property with a modern extension" - soon prompted criticism.