The location of new incinerator for South Wales will be decided today.
The two sites being considered are Llanwern in Newport or Splott in Cardiff.
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Police carried out door-to-door enquiries.
The UEFA Champions League final in Cardiff this Saturday is billed as the biggest ever sporting event in the UK since the 2012 Olympics.
Cloudy with patchy rain or drizzle, possibly turning heavier for a time.