A retrograde step.
Most other airports in Europe have removed the stupid coin slots from baggage trolleys.
Sounds like yet another desperate hair brained idea from management, which they think will raise money, as people will abandon trolleys with coins still in them. It won't, as coins are cash and find there way into pockets, not to be accounted for.
Also the maintainence cost of the slots will be found to be a negative on the balance sheet.