Couple of corrections there buddy,
The shelf stackers generally work nights and are paid more than any other general assistant. Trolley boys are paid the same as till staff as they're general assistant too, and finally health and safety us the job of everyone in the store, but as a union health and safety rep it's my job to report it to the local authority if they don't follow the rules.
Thank you for that information, however I didn't actually intend to start a debate about the career structure and payscales within the supermarket retail industry. As it happens, it's a rather large industry involving a number of different employers, and therefore there is likely to be some variation across the industry with regard to who is paid what, to perform which role. The explanation I gave with regard to this, was in fact correct across the particular chain of stores that I worked in. It is clearly a very different situation within yours though and therefore I can only apologise if I gave the impression that the rank structure is identical in every supermarket across the land.
As for the health & safety issue, if you read my original post, what I actually stated was that it wasn't generally the role of a trolley boy to "enforce" health & safety in the car park. "Reporting" of Health & safety issues, is of course a very different matter and is the responsibility of all employees across all industries, as per the Health and Safety at Work Act 1974.
If you read my subsequent post you will see that the point I was actually trying to make in all of this, was less about how much anyone gets paid, and more about people trying to exert/abuse the authority that they seem to think that a uniform gives them.
this was utter *******, so I asked him how much of a moron he thought I was, knowing he was behind me. 
