Merseyside Police said that officers from Lancashire Constabulary had arrested a 51-year-old man for being unlawfully at large last night.
The man, who was not named, was arrested in Blackburn, Lancashire, at around 9.15pm.
Inquiries to locate Pickering were continuing.
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Parents in Anglesey, North Wales, will have to show birth certificates in order to prove their child's age and qualify for the scheme.