Each year, April 28 is designated as Workers' Memorial Day, providing the opportunity to reflect on the many people who are killed, seriously injured or made ill while doing their jobs.
There are dozens of permanent memorials to lost workers around the UK, and many of them host ceremonies on April 28.
Some of the memorials commemorate high-profile disasters that claimed the lives of many workers and others remember lesser-known accidents in which one or two workers were killed.
In 2010, RoSPA's National Occupational Safety and Health Committee initiated the creation of a website - www.sheilapantry.com/memorial/ - to provide comprehensive information about the memorial sites.
The website, put together by health and safety information expert Sheila Pantry, is updated regularly. It includes location information about a variety of memorials, as well as photographs, details of temporary commemorative sites, links to other sources of information and a diary of events.
Among the many permanent memorials listed on the website are those dedicated to victims of disasters at the Piper Alpha oilrig near Aberdeen, the Flixborough chemical plant in Lincolnshire and the Senghenydd mine in Wales.
Memorials added to the site include: the Six Bells Colliery Disaster Memorial near Aberdeeg in South Wales, which remembers 45 workers killed in a gas and dust explosion in 1960; Postman's Park in the City of London, which remembers men and women who gave their lives while attempting to save others; and two memorials to Mathew Gilbert, who was killed during the construction of Heathrow Terminal 5 in 2005.
But it must be remembered that for every catastrophe involving multiple fatalities, there are hundreds more accidents for which there is no public memorial. Grieving families, colleagues and employers mark these accidents quietly.
A memorial day for workers - now observed in 19 countries - was first recognised in Canada in 1984.
Since 1989, trade unions across the world have organised events on or near April 28, which is the anniversary of the Occupational Health and Safety Act in the USA. In 2001, the International Labour Organisation also declared April 28 as International Day of Action for Safety and Health at Work.
Workers' Memorial Day was officially recognised in the UK for the first time in 2010.
To have a memorial listed on the website, email Sheila Pantry at firstname.lastname@example.org.