A bit of a lack of common sense, I think that the law was intended to tackle the sale of animals that need a degree of personal care. A goldfish just needs the odd pinch of food and occasional water maintenance.
I'd compare it to selling a tin of Ben Shaws shandy to a schoolboy, not what the law was intend for.
it seems that the council decided to send the boy into the shop as a result of other complaints that this woman had sold animals to under-age children. There was also a story about an injured Cockatiel in a cage, and a Gerbil allegedly sold to a young girl with learning difficulties. The Gerbil died when it was placed in a disposable coffee cup with the lid on.
It's unusual for a local authority to prosecute a shopkeeper on the basis of a single report or incident.
I think this is an early April Fool and you lot have fallen for it. You do not get tagged and given a curfew for this sort of think. I doubt she is selling animals to under age persons at 2 in the morning.
Well, I for one feel a lot safer that our tax payers money is supporting trading standards in this efficient and worthy way. It's much better for them to sting little old ladies selling goldfish than prosecute all the cowboys traders ripping of pensioners.