It sounds to me like what you're asking for is a way to generate
something you can send to a supplier saying "during this month I paid
you £X on date A for invoice N, £Y on date B for invoices M and P, ..."
That is correct - ideally I would like to have that. However I could work with a workaround solution.
I went and did the "purchases->view payments" and did the advance search. That is the information that I could use, because it shows the date of the invoice. However there is no way I can send that or a selection of that to my suppliers. Even if I do export the data (which I would not want to as it's more long winded) the exported data only shows payment date, not the invoice date. I wonder if that could be added at least?
I think all the information is there, it just needs a button to email the selected payments to the supplier (including invoice date at least, as without invoice date or invoice number the supplier won't know what exactly has been paid).
I wonder if I am among the few ones needing this?