Denise Charlesworth-Smith, who lives in Brookville, near Methwold, has told Daybreak that her father, Phil, was placed on the controversial Liverpool Care Plan by a Nottinghamshire hospital without any consultation with her family.
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The violence began after a counter-protester allegedly doused a female rally organiser with pepper spray.
As temperatures climb through the day, the warmest spots are likely to be across western parts of Northern Ireland and western Scotland.
The foreign secretary has criticised internet and social media giants for failing to detect and remove extremist material posted online.