The four men returned to Cardiff Crown Court and were sentenced as follows:

•            Keith Young, 74, of Llandough, Vale of Glamorgan: 45-week sentence suspended for 18 months. He must pay costs of £66,000.

•            Stewart Swain, 54, of Rhiwbina, Cardiff: 39-week sentence suspended for 15 months. He must pay costs of £25,000.

•            Philip Thomas, 57, of Thornhill, Cardiff: 36-week sentence suspended for 15 months. He must pay costs of £20,000.

•            Richard Dean, 60, of Abertillery, Blaenau Gwent: 35-week sentence suspended for 15 months. He must pay costs of £20,000.

•            Swain Scaffolding Ltd fined £120,000 with costs of £25,000.

•            South Wales Safety Consultancy Ltd fined £97,500 with £17,500 costs.

•            NJP Consultant Engineers Ltd fined £93,300 with £6,700 in costs.

•            Strongs Partnership Ltd: fined £33,500 with £17,500 in costs.

 Detective Inspector Stuart Wales, from the South Wales Police Major Crime Investigation Team, said: “Jeff Plevey was an experienced scaffolder and a popular hard-working man who was owed a duty of care when he went into work that day.

“Our thoughts are with Jeff’s family and friends who have waited four and a half years to see justice done following his untimely and avoidable death on 18 July, 2017.

Speaking after the hearing, HSE inspector Liam Osborne said: "Jeff Plevey died because people were put to work on a scaffold against a towering stone wall that managers, safety professionals and contractors knew, or could see, was obviously unstable before work started.  

“The demolition and scaffolding were badly planned and dangerously carried out from the very beginning, and throughout the job. Instead of the building being made safer as demolition progressed, it became even more unstable.  Those people who made bad decisions, gave poor advice, or failed to act in the face of extreme and obvious risk have now been held accountable.”