The families of two men who died following an explosion at the Celsa steelworks in Cardiff in November have issued tributes.

Peter O’Brien, 51, from Llanishen, Cardiff, and Mark Sim, 41, from Caldicot, Gwent, died at the site where they both worked.

A joint investigation by South Wales Police and Health and Safety Executive to establish the cause of the explosion is on-going.

Credit: Family Photo

Mark Sim’s wife Samantha said she wished to thanks everybody involved with the "terrible tragedy":

Mark was dedicated to his job and would always do it to the best of his ability and was always willing to help others. He was dedicated to his home life as much as work, he had two families Celsa and home. I will cherish time we had together, the laughs and parties because Mark loved a good party - always the last one to leave. He help coached the local under 14’s football team. Mark will leave a big hole in our hearts and a great void in the lives of his daughter Georgia and son Jackson and to everyone lives that he touch. I would like to thank all our friends and family for their continued support at this difficult time.”

Samantha Sim
Credit: Family Photo

The family of the second man who died, Peter O'Brien, said he also paid a "major role" in the community:

Dad was a kind, gentle and funny man who loved the simple things in life - the outdoors, camping, burning things on the barbecue and of course spending time with his loving family. He took a major role as a member of the church and local community, through the 27 years of marriage he and mum have spent time running Christ the King Junior Club, he was involved in rugby coaching at his children's primary school for many years and loved his role as Confirmation Catechist at Christ the King parish church. He loved playing sport and was a keen gymnast in his youth, as well as being a respected rugby player and award winning bowls player for St Peters well into his adult life. We’ll always remember his huge appetite and insistence on having Classic FM on in the car as well his cheesy jokes and big smile. Rest in peace, thanks for everything, we’ll miss you.

Family of Peter O'Brien

Mark Sim’s funeral will take place at the Forest of Dean Crematorium on Tuesday, December 15th at 3.30pm and the Seven View Club, Caldicot. Only family flowers and donations to Help the Heroes.

Peter’s funeral will take place at Christ the King Church, Llanishen, on Thursday, December 10th at 1pm.