As humorous as the story is, the pedant in me can't let go of the line "the pair took the gigantic silver cup, which weighs up to 15kg,"
It can't weigh up to 15 kg, as it's weight can't fluctuate (well technically it's mass can diminish but not enough to count in this context.)
It can weigh 15kg, around 15kg, just under/over 15 kg but not up to 15kg.
Pedants rant over.
As others have said, unbelievable for those that have only known football in the mega money era.
It's a good job it wasn't Ron Saunders they had to confess to!