21 people died and more than 180 were injured after bombs exploded in two Birmingham pubs on the evening of November 1974.
ITV News Central has been speaking to some of the relatives of those who lost their lives that day.
Michael Beasley was 30-years-old when he was killed at the Mulberry Bush pub.
James Caddick was from Albert Road in the Aston area of Birmingham. He was 56-years-old when he lost his life in the Mulberry Bush. He was married at the time of his death.
Charles (Charlie) Grey originally came from Scotland but travelled to Birmingham with his brother Bob to look for work. At the time of his death, the 44-year-old was living in Sparkbrook.
Neil Marsh was 17 when he died alongside his friend Paul Davies. The pair had been planning to go to a youth club that night but it was closed so they headed into town instead.
The pair were in New Street and walking past the Tavern in the Town when the bomb inside went off.
Father of three Trevor Thrupp was 33 when he died in the Mulberry Bush pub. The railway worker had only gone in to buy cigarettes.
Pamela Palmer was in the Mulberry Bush with her fiancée Derek Blake when one of the bombs went off. Derek survived but lost a leg.
Speaking to us in 1975 he said he remembered a “lightening blue flash” and then “everything went black.” He was calling out for Pam but realised he couldn’t move or get to her.
Lynn Bennett, 18, came from Castle Vale and died in the Tavern in the Town explosion.
Thomas Chaytor, 28, was a barman working in the Tavern in the Town, he died of his injuries in hospital a week later on 28 November 1974.
Anne Hayes was a shop worker from Sutton Coldfield and had gone for a drink with her friend Marilyn, who was also killed. The 19-year-old worked for Lewis’s department store in the Miss Selfridge section.
Marilyn Nash was having a drink with her friend and co-worker Anne on payday. The 22-year-old from Pelsall was working in the Miss Selfridge department of a local department store.
“Inseparable brothers” Desmond and Eugene Reilly were from an Irish Catholic family but were born and brought up in Birmingham. Desmond, who was newly married, was with his older brother Eugene in the Tavern in the Town when the bomb was detonated at 8.27pm.
Their mother Bridget Reilly, who passed away in 2010, spoke to ITV News Central back in 1975. Eugene was still living at home at the time of his death and she said that she would lie awake at night waiting for him to come home.
Mrs Reilly said “no words can describe how it’s affected us, it’s terrible, just terrible.” She said she would never get over the loss of her two sons.
Desmond was also expecting his first baby in three months time with his new wife Elaine. Speaking to us in 1975, she said “I can’t explain it very much, how upset I am. We were only married a short time and he was looking forward to this baby because I lost two.”
His family thought he was working 200 miles away in Durham and he wasn’t due home in Birmingham until the weekend but had dropped into the pub for a drink with his brother. Their father went to identify Eugene, not knowing that his other son had also died that night, until he was asked to identify him as well.
Maureen Roberts was 20-years-old when she died. She lived in Orpwood Road in Birmingham.
Stephen Whalley was a quantity surveyor from Bloxwich. The 21-year-old was killed at the Tavern in the Town whilst out on a first date.