Rosie welcomed Jamal into her home after social workers told her he was a 12-year-old orphan refugee from Afghanistan.
But Rosie soon had her suspicions about her “humble, polite” guest after noticing how hairy he was.
A dentist estimated that Jamal was more than a decade older than he claimed.
Taliban material and child abuse images were later found on his phone, according to The Sun.
Rosie, whose full name remains anonymous, had three other youngsters in her home and claimed Jamal was able to fire a rifle.
The news comes just days after migrants claiming to be children were brought to the UK from the Calais Jungle camp.
Questions over the ages of the newly arrived youngsters have concerned many, with some demanding the refugees’ dental records are checked.
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