You'll be referring to
this and possibly
this!
There's been quite of lot of guidance issued on cylinders from both the
HSE and the
MHRA and most cylinders should already be in a cradle/bracket/trolley due to their possible damage to valves or larger cylinders injury to staff. At least it's policy at our Trust as it went through Trust health & safety committee sometime ago. Along with the issuing of fire extinguishers in vehicles used to transport cylinders.
This was a later news story from the inquest which reported the incident was due to a faulty cylinder.