I will try and explain as best I can.

As a director i took 10k out of another business account (lets call business 1) to help the cashflow of my Sage Accounting business (call that business 2)  I entered this transaction under 2300 directors loan.

Now that my cashflow is back to normal -  I want to pay back business 1 the money i loaned. 

Its easy if I am simply making the payments from 1200 bank back to director bank account  using 2300 nominal

but how do i pay back the directors loan 2300 if business 2 has paid for some supplier invoices  on behalf of business 1 (or directors loan)

Hope it makes sense.