The man was arrested in Ipswich this morning.
The Serious Organised Crime Agency says it is the first arrest as part of Operation Pallial, which last November started investigating recent allegations relating to historic child abuse in North Wales.
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Becoming drier and brighter from the northwest during the day, but with the risk of scattered, locally heavy, showers developing later.
Warren Gatland says he 'feels massively' for the players who didn't make his final squad and said some decisions were 'the toss of a coin.'
Wales' final 31-man Rugby World Cup squad has been announced.