With respect to Mad_jock; dispatch within or outside company limits (for a delay report?) has nothing to do with whether or not an MOR is needed.
No not for a delay report. For a load sheet error.
But to be honest the technical ins and outs of when to submit a MOR is a wee bit outside the scope of Alex looking for a reason for getting thier weekend mucked about.
Edited to add they can sometimes update the TAF as many times as the METAR in ABZ. ABZ and INV must hold the world record for number of Mayday's worked in one day when the Haar rolls in unforcast and drops the RVR down to <300m and all the heli's have to divert.