As workers, employers and unions commemorated International Workers Memorial Day on Friday, new figures show more than 150 Cherwell workers reported suffering injuries at their jobs last year.
However, the figures were questioned by unions, who said deaths from certain sectors were not included, as well as from work-related illnesses such as asbestos exposure.
The GMB trade union said it is "extremely sceptical" that the current data shows the full story, and claimed there are issues with under-reporting.
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The latest figures from the Health and Safety Executive, known as reporting of injuries, diseases and dangerous occurrences regulations (RIDDOR), show 177 people reported suffering injuries at work in Cherwell in 2021-22.
But this was down from 192 in 2018-19, before the coronavirus pandemic.
Across Great Britain, 61,700 workers reported non-fatal injuries in 2021-22, down from 69,300 in 2018-19.
An injury is recorded if an employee misses the following seven days of work, or if they suffer a fracture, amputation, reduction or loss of sight, serious burn, a head injury which causes unconsciousness, scalping, crush-related injuries, or hypothermia or heat-induced illness caused by working in an enclosed space.
Daniel Shears, national health and safety officer at GMB, said: "While almost all work-related fatalities in the scope of RIDDOR will be reported, by definition this excludes deaths at sea, deaths airside in aviation, all work-related road traffic fatalities, and work-related suicides."
Mr Shears said adding these and those from long-term illnesses caused in the workplace puts the true figure of annual deaths in the UK between 20,000 and 50,000.
He also called on greater funding for regulators to increase the number of employers reporting injuries and fatalities.
The figures also showed 130 (73 per cent) of the 177 non-fatal injuries recorded in Cherwell resulted in someone missing at least seven working days.
Meanwhile, 1,100 people have died at work across Great Britain over the last eight years, when comparable figures began – of them, three were in Cherwell.
Shelly Asquith, health and safety lead at the TUC, said: "Now is not the time for complacency. Too many people are dying from avoidable workplace accidents and illnesses."
Ms Asquith also called on the government to provide "proper investment in health and safety enforcement".
"The HSE has had more than half its budget cut in the last 10 years," she added.
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