Obviously it was in the hope that you would clarify your statement about a lot more being known.
Apart from the ones you had (which includes David's ones which I wasn't to know as you only mentioned the £1000 being from you) I have seen only 1 of each of the £5000s and £10000s which I made perfectly clear. As you know, there are only 2 x £500s known. None of those figures constitute "a lot more" than previously known. All I did was say about the ones I know about, that was all. I was not tossing about numbers.
Maybe if you let us know exactly how many you had (and letting us know that all of the ones in David's sale were yours not just the £1000) then maybe more will be known about how many are possibly already accounted for.
So 3 or 4 sets from you (plus singles) with the ones I've seen, obviously I can't speak for anybody else regarding how many others are out there but then neither can you (or anybody else) without more research (or tracking of serial numbers) so.......................