The Queen will no longer travel to Rome this week after being admitted to hospital, Buckingham Palace has said.
The Italian presidency has confirmed the scheduled two-day visit has been cancelled due to "health reasons", Reuters reported.
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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.