So, the Royal Society of Chemistry (who, by the way, have excellent initials) are looking for a solution to the problem at the end of the Italian Job.
Um, isn’t this pretty easy? The person in the middle first needs to go and join his mates. Then, once the bus (Is it a bus or a lorry? Never seen the film) is stable, they need to add more weight to that end of the bus. Even small amounts of earth and pebbles will make a difference, since they are at a fair distance from the pivot and since the vehicle is clearly almost stable without. Eventually they’ll have added enough to allow one person to get off the bus and go and find heavier rocks. And soon there will be enough to keep the bus stable while one person goes to the other end and brings the gold back. Once they’ve brought one chunk (ingot? bar? Haven’t seen the film, dunno.) back, the balance will have shifted sufficiently that there will be no difficulty with the rest.