In the UK you need to prove beyond reasonable doubt to get a criminal conviction. Balance of probabilities is just for civil cases I believe.
I would think though that it could be seen as advertising child pornography if you provided the links that were all to child porn or that the links were labeled as child porn.
I would think though that it could be seen as advertising child pornography if you provided the links that were all to child porn or that the links were labeled as child porn.