Apart from the various journal messages left for my wc, I had left a couple under the category 'A Payment' that went unanswered.
One such message was about having repayments deferred for a UC advance, which I had to nudge my work coach about who then gave me the incorrect number to call, see
this.
Searching around the interweb I found this ...
A payment – this generates a to-do for the case manager to respond to
But, someone says, here, that journal messages only have a priority of 6 and you'd be better of calling the service centre.
Some useful info on journals
here.