Each time we place an order we need to specify an order number. There is no facility to do so. We cannot edit the address to add this somewhere as we already have the maximum number of addresses!
[LED Lighthouse's web developers' response]
Hi Roger, We're sorry you have had this difficulty.
We're a little puzzled by why you didn't tell us about the problem. We can't fix a problem that we don't know about.
In future you will be able to specify an order number in the Notes field.