Fabian Delph has not been arrested for alleged child sex offences. This isn't sarcasm or a suspiciously specific denial or anything, just a statement of fact.
For context, it was announced earlier today that a Premier League player was arrested on suspicion of alleged child sex offences. In light of UK laws banning the naming of people who have only been arrested but not convicted of these offences the police did not name the player involved resorting to their usual standards of only confirming the age & gender of the individual under suspicion (in this instance "a 31 year old man has been arrested"). Everton FC would later confirm that it was one of their players who had been arrested & that he had been suspended by the club pending the police investigation. There are only two 31 year olds playing for Everton - Fabian Delph & Gylfi Siggurdson.
While it would be illegal for me to name which player was arrested there's no law saying that if someone hasn't been arrested for a given crime then I can't say that they haven't been arrested. So, yeah, Fabian Delph has not been arrested for alleged child sex offences.