Can you help please we have new emergency lights fitted outside our fire exits, and some have the led charging light at the bottom (easy to see and some have it at the top very difficult to see from underneath my question is should these be on the bottom of the lamp or the top?

I am not aware of any requirements on the location of warning LEDs on EL liminaires however in your case, if they are outside your fire exits they are likely to be bulkhead lights fitted to a vertical wall and those with the LED on the top rotate them 180 degrees and it will be on the bottom as you require.