prize bonds win tax implications

Just won a couple of €75 on the Prize Bonds in the last 3 months. Are the winnings tax free or do they have to be declared ?
There are two questions here.
Yes they are tax free.
But the unanswered one is do you have to declare them?

I dont know the answer but in the same way rent a room below the threshold is tax free, you still are supposed to declare it.
 
I've never bothered declaring any (marginal) PB winnings myself.

FWIW (maybe nothing) ChatGPT says that you don't need to declare them unlike some other forms of tax exempt income.
 
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