Thanks Jim, thats great and yes I will gladly post from our next Moth trapping experience.  Charlies OK and still keen, nowadays well into wildlife photography and more recently Moths.. I will pass on your regards when I see him, which should be in the next few days. 
I dont know what sort of trap you would call it, in fact I dont suppose it is a trap as such, more of a very big spotlight (the sort what comes in a black metal guarded frame which you could probably associate more with the Fire Brigade or Building Sites etc, its approx size of 18"x12", and this supports a great big bulb in its interior, the likes of bulb I have never seen before).  He sets this up with his portable generator and lays a large white bedding sheet to the front of the light and the Moths, Beetles etc land on the sheet and closeby the spotlight.  
Its all new to us and to be honest with you the data collecting is in its infancy, with just the odd species or two actually identified and logged although we have photos of stuff archived and not yet identified.  I am lucky to have Souths Volumes and as soon as I get a little more time, I will have another bash to identify.  Although these volumes maybe or have been in the past a authoritive works, sadly their preparation are from the good old days which tend to show specimens has they would be presented for museums etc with outspread wings.  When the specimens we are witnessing are far from spread out wings.  My standard, simple, general,  Collins - Complete British Wildlife, perhaps give better examples, although far from conclusive! but at least you get photo examples in these more modern references.  Eventually lets hope we can get around to sending some records to the Lancashire Moth Recording.

Hope to have some records for you shortly.
Bryan.

Hi Boys, just picked up the thread. Regarding books have you seen Moths of the British Isles by Bernard Skinner published 1984. Its a large format book with all the species "pinned out" so to speak and runs to 250 pages or so. Apparently the second edition is the one to have as all the mistakes had been rectified by then. There are some revues on Amazon if you are interested but be warned it runs pretty dear at £ 35:00.

Bob.