In 2016 Taser was deployed to incidents on 487 occasions between January 1 and December 31. During this time it was used on 75 separate occasions, but only fired 14 times at 13 different incidents (at one firearms incident two firearms officers made the decision to both fire their Tasers at a male in possession of a handgun).
The Taser was fired at four incidents where police officers were threatened with weapons, three occasions to prevent vulnerable individuals from harming themselves, three times when police were threatened or subjected with violence during an arrest, once to prevent an individual going airside at the airport and deployed three times whilst firearms officers were dealing with individuals armed with handguns.
As can be seen from the data below, the threat of Taser is normally enough to negate the threat of violence as out of the 75 times it was drawn from the holster by trained officers, it was only actually fired on 14 occasions. During 2016 the Taser was discharged during less than 2% of all Taser deployments.
In 2015 Derbyshire officers fired the Taser a total of 14 occasions. Twice to prevent subjects self-harming, five times against subjects suspected to be armed with weapons, six times when police were threatened or subjected with violence during an arrest and once to prevent a subject from using a handgun. During this period officers with Taser were deployed to attend 540 different incidents, in 453 of these incidents, no Tasers were used in any way during the incident. The breakdown of how the Taser was used in the other 87 incidents is recorded below.
As can be seen from the data below, the threat of Taser is normally enough to negate the threat of violence as out of the 87 times it was drawn from the holster by trained officers, it was only actually fired on 14 occasions.
Note: the term 'drawn' is divided into six sub-categories. These are simply draw, aimed, arced, red dot, drive stun and fired.
Link to Home Office data
Home Office Taser Stats