Two women, aged 27 and 28, have been arrested on suspicion of an offence under the Dangerous Dogs Act.
It follows the death of a 79-year-old man in the Clubmoor district of Liverpool after a dog attack.
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Through the day, most of the cloud should break up to leave fine conditions for many with spells of sunshine.
The Eiffel Tower in Paris was plunged into darkness, with the Burj Khalifa in Dubia emblazoned with the Union Jack.
The major party leaders' campaigns for the General Election will remain suspended on Wednesday following the Manchester terror attack.