Police searching for missing 14-year-old Lorna Vickerage have told ITV Daybreak that John Bush, who is wanted on suspicion of child abduction, is "known as a fraudster."
DCI Craig Robinson said: "There is no doubt he will use his skills as a fraudster to hide his identity and he will tell people [Lorna] is his daughter, when she's not."
More top news
The operation to recover the unexploded bomb near the Houses of Parliament let to disruption in central London overnight.
Southern parts of England and Wales will see sunny skies after a frosty start.
A police spokesman said the incident in the Bourke Street Mall on Friday was not related to terrorism.