The mayor of Middlesbrough has written to the justice secretary, appealing for the government to make Teesside's coroner resign - and ITV News has had exclusive access to the letter.
There have been repeated calls for Michael Sheffield to step down, after it was found that the Teesside coroner's service had up to 300 families waiting for inquests at any one time.
However, the coroner says the backlog has been reduced and the service is now progressing well.
Watch the full report from Frances Read below.
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Sandiford, a former legal secretary originally from Redcar, was convicted of drug smuggling offences and sentenced to death in 2013.
Durham Crown Court heard that one of the male victims suffered a triple-fractured jaw, while left lying in the gutter, unconscious.