If it's a real story, maybe. It's the Sun, after all - for it and the Daily Mail, I'd want independent corroboration if they said the sun rose in the East that morning.

For this story covering a remarkable string of thefts over four years? This Sun article is the only source being repeated by others in a few quick searches.

I guess, but what are they going to do? It's not exactly easy to replace a system of pneumatic tubes for transferring money within a building; a suitable replacement is going to take forever to conceive and implement. And they've only lost €600,000 in 4 years = €150,000/year. If they chose to hire a security guard at every Monoprix, 7 days a week, they would have to spend at least several million Euros per year.