They say 1 month in arrears.
They blame a problem with the application for my CRB for the delay in activating my contract and resulting delay in my pay. I work in Further Education. However, I do not feel liable for the problem with the delay in processing my CRB as they asked me to pilot a trial online application. I encountered glitches with the online application, informed IT help who did not respond to my email. I did call them to alert them too and I awaited further instruction from the IT staff - it didn't come. Eventually I sorted the problem myself through trial and error. Technically they should not have started me to work without the CRB clearance, I therefore feel their delaying my pay is unjust on this basis alone. Moreover, I had done some work for the same agency a few months earlier, as it was only a few days emergency cover they did not even bother with a CRB., neither did it interfere with my getting paid.