From the RAF intranet:
Regrettably, an error has been made by AFPAA in the processing of July salary payments, which were due to be paid into the bank by today, 31 July. This affects most European banks (with the exception of those in Cyprus) and some international payments (with the exception of the USA and Canada). These payments will be credited into the relevant banks by Friday, 4 Aug at the latest. Further communication will be issued as the details of the specific units involved become available. This situation was the result of regrettable human error.
I do like the last sentance.