£22 for light bulb
I suspect this is a side effect of "just in time" systems, rather than holding a reasonable stock of consumables with users. JIT was supposed to save money by avoiding the cost of large stocks of spares, but taken to extremes is plain stupid
I suspect this cost a great deal more than £22. To raise a requisition enter it on a computer. Someone in stores to find it, pick up the item and send it out is where the costs occur