4,000 people living close to the Dartford Crossing will be given the welcome option of cheaper travel from March next year. People registered in the Local Resident Discount Scheme will be able to make unlimited trips over the crossing for £20 a year.
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George Michael died in December last year at the age of 53.
PC Keith Palmer, 48, stabbed by Khalid Masood while on duty in the grounds of the Palace of Westminster last Wednesday.
Those gathered on the bridge fell silent at 2.40pm - the time the first call was made to police exactly seven days ago.