Storage of Gas cyclinders

[Collegeboy]

Hello my right honourable friends 
Question / Query
How many of you have been into camping stores / Garden centres, especially Go-Outdoors, and seen those Crates FULL of the small Gas cyclinders that Campers / Fishermen use, or shelves with cylinders stacked 6 deep is this even allowed, is it Legal to have such risk sat there Inside, what about gas leak spreading at low level around the store,  what about explosion risk to firefighters should a fire occur, anybody got any info if these stores are allowed to do this