Operators at a 9-9-9 centre in Blackburn have helped celebrate the service's 75th birthday today.
They work in BT's oldest current emergency call centre.
Burnley, Livepool, Macclesfield, Manchester and Rochdale, were among the first areas outside London to use the treble nine number.
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A provisional trial date has been set for three people accused of murdering four children in a house fire.
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