450 Yorkshire Ambulance workers are walking out in a row over cutbacks and changes to the service. Paramedics and other ambulance staff are on strike for 24 hours.
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Zachariah Mcguirk was last seen on Tuesday evening
Steven Smith, 48 from Rotherham died after falling 800ft on Snowdon.
The poll comes ahead of a debate in the House of Commons on Friday on a new Bill which would introduce such a system in England.