News International's former legal adviser Tom Crone is the 25th person to be arrested under Operation Weeting, the Metropolitan Police's investigation into allegations of phone hacking.
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ITV News rounds up the best pictures of the day as campaigners make a final stand before Theresa May triggers Brexit on Wednesday.
After a cold, frosty, and in places foggy start, it has become a wonderfully sunny day with blue skies.
PC Keith Palmer will be given a lasting tribute after he lost his life "in order to keep others safe" during Westminster terror attack.